Wednesday, October 25, 2017

Disable CAPS lock in Ubuntu 16.04

In a terminal window (Alt+Ctrl+T), type:
dconf write /org/gnome/desktop/input-sources/xkb-options "['caps:none']"
(brunch875's answer to Deactivate Caps Lock in 14.04)

Saturday, December 10, 2016

Windows 10 update broke my Ubuntu linux and boot-repair didn't work [SOLVED]

Today I logged into Windows on my dual-boot Ubuntu 16.04 / Windows 10 laptop, which I don't do very often, and Windows installed a heap of updates.
Seemed very fine to me until I restarted and tried to start my faithful Ubuntu - and to my dismay got stranded in a primitive text-only screen with a few lines of text that ended in:

So, as had happened before, Windows again borked my boot loader. Sigh. (And some profanities which I won't repeat here).

I already had repaired my boot loader in similar circumstances before, using Boot-Repair, but couldn't find my Boot-Repair Live USB so decided to boot into a Ubuntu 16.04 live USB and start Boot-Repair from there (following the "2nd option: install Boot-Repair in Ubuntu" on the Boot-Repair wiki page).

I did "Recommended repair" in Boot-Repair, but at the end I got a message that it had not worked due to "Locked-ESP detected", and I was recommended to create a /boot/EFI partition at the start of the disc, using eg. gParted.

I launched gParted and saw that there was already a /boot/efi partition on my hard drive, but I also saw little key icons next to the names of all the partitions - which rung a bell with the "Locked-ESP" message.

So I right-clicked the partitions one by one in gParted and selected "unmount", which made the key icons disappear.

I then started boot-repair again, with the Recommended Repair option, and lo and behold, it fixed my system neatly.

I do feel that it should be explained on the Boot-Repair wiki page that the hard drive has to be unmounted before attempting to run Boot-Repair with the 2nd option (installing it in Ubuntu"), but for this one edit to the wiki I can't find the courage to go through the process of getting the right account and permissions on the Wiki. So hopefully someone that already has those, will do the job...

Friday, April 10, 2015

7 free computer things I couldn't do without

Time to give credit where credit's due. Here are a few of the things, free as in free speech and free beer, I got so accustomed to I couldn't live without anymore (well, almost). May the force be always with them. Amen.

1. Open source software

I've been an open source fan ever since I heard about its existence, back in the days when you had to stay up nights trying to get your monitor back up because something got broken again. (Or, more precisely, you broke it yourself because that's where the fun part was). I didn't even mind, I just loved the whole idea.
Now most open source software out there is as good as any other, and a lot more congenial. Actually, it's more than congenial, it's on ongoing revolution and anyone can be part of it.
Of the open source software I use, here are some programs/systems I couldn't do without anymore (not necessarily in order of importance):

  • Inkscape:
    awesome SVG (scalable vector graphics) editor, or, more simply put, a vector drawing program like Illustrator. Only this one is free, as in free speech and free beer, and adheres as much as possible to open SVG standards. It's more than mature, more than stable, and if you find any bugs, be cool and just report them (and don't pressure anyone afterwards, remember, it's all free and voluntary). Thumbs up for Inkscape. Inkscape exists for Windows, Linux and Mac. I make all my contemporary art drawings with it, and learn every day.

  • Ubuntu Linux

    needs no further introduction. It's absolutely fabulously great. I shouldn't even be talking to you if you haven't got it running on some computer somewhere. Or, maybe, on second thoughts, it's exactly you I should be talking to. Try it if you haven't already! I still have Windows on dual boot, but hardly ever use it. Ubuntu rocks!

  • The Gimp.

    Who needs Photoshop anyway. Get Gimpin'!

  • Libreoffice.

    A full suite that does most things MS Word, MS Excel, MS Powerpoint and MS Please-pay-my-big-yacht-you-sucker does for you, only in an endlessly better quality/price ratio, because it's completely and totally free. And it works! (Yes, it has its quirks here and there, but so do I so we get along fine).

  • Kdenlive:

    a full-blown and fully functional non-linear video editor. I'm not a video pro so can't tell you if it has all the features pro's would need, but as far as amateur editing goes, it has more than I can handle. A bit of a learning curve, but nothing you can't cope. Only for Linux.

2. Internet things

Some of the "computer things" I use aren't exactly installed on my PC (let's not get too technical here), but I couldn't live without them anyway. Here's a non-exhaustive list:

  • Lastpass:

    a fabulous password manager. One password gets you into your heavily secured vault that contains all other passwords, available online and/or offline. Lastpass doesn't even know your passwords, as they are already encrypted when they leave your PC. Apart from that, it comes with multi-factor security. The browser plugin works interactively on all pages where you can login, and can generate new strong passwords when you need them. And all that, for free, or for a ridiculously low price as a Premium user. Great stuff.

  • Flattr:

    I recently discovered the (micro)donation service Flattr. Basically, it's a great way to manage your monthly donations to all those cool projects and persons out there, without hassle. You set the monthly total and happily Flattr away, Flattr does the rest for you. And if you're a creator, you can put your Flattr button on your own site (like mine, above to the right ;) ). Cool.

  • to be continued/completed...

Wednesday, April 1, 2015

Why Flattr does mattr

Have you ever wanted to contribute to projects that make your heart beat faster, or your life more pleasant, but finally didn't, because:
  • one-time payments seem too much of a hassle, or you just never get around to them?
  • recurrent contributions seem scary: who knows how much slack you'll have on your budget in six months' time? Maybe you're committing to something you'll regret later?
  • you want to have the freedom to pick and choose at any given moment who you support, but at the same time don't want to exceed a given monthly budget for your total contributions? And you can't figure out how to combine freedom and budget control?

In that case, you probably end up, like me, contributing much less than you want and can, just because of practical problems. Which is truly a shame.

Yes, Flattr is worth it!

Flattr logo

Luckily, there is Flattr! I knew about it for a long time, but only recently joined it. And I'm super happy with it! Here's why:

  • you decide, up front, how much you want to spend contributing each month. No unpleasant surprises because you were too generous for your budget. If you can't spend more than €2 a month contributing, €2 will be the maximum you spend, independently of how many projects you support! (At the end of the month, your €2 will simply be divided between the projects you clicked on, whether it was one or one hundred). This goes for one-time contributions and recurrent subscriptions alike: your montly limit is always respected!
  • you can, at the click of a mouse button, decide whether you want to just give a one-time contribution, or have Flattr include the project as a monthly recurrent beneficiary. (Clicking once on a Flattr button means a one-time contribution, clicking twice makes it into a monthly subscription). If you change your mind, just remove it again from the recurrent beneficiaries list at another click of the mouse.
  • if during a month you didn't "flattr" anyone, your budget is carried over to the next month.
  • in case you receive money through flatter, every time you have earned at least €5, you can have them paid out to you (or pass them on by flattring of course)
  • You can stop flattring any time, temporarily or for good. (Your Flattr funds will just stay where they are, or you can give them to beneficiaries, or in a soon-to-come update of the Flattr system you should be able to get them paid out to you).

Go for it!
Just have a go at it! Head over to, sign up, put some money on your Flattr account (just a few bucks to start is more than enough), and go flattring all those beautiful people and projects that make internet and the world a better place!
You'll feel great and so will they! Finally, donating has become simple, safe, budget-friendly, free and fun.

For more information, head over to How Flattr works on the Flattr website.

If you appreciated this article for some reason or another, please share it (see the buttons below), and, of course, don't forget to Flattr ;)

(Flattr logo source: Wikimedia).

P.S. I'm just an enthusiastic Flattr user and am in no way affiliated to Flattr. My Flattr profile is here: bartovan.

Saturday, March 28, 2015

How to add Facebook like, Google plus and Twitter Tweet buttons to Tumblr blog

How to put Facebook like, Google plus and Twitter Tweet buttons in every post of your Tumblr blog...

Facebook Like Button for Tumblr

Go to the Facebook "Like button for the web" page and configure the button you need.
Then click on "Get code". A two-part code will be shown.
In my case:

Part 1:

<div id="fb-root"></div>
<script>(function(d, s, id) {
  var js, fjs = d.getElementsByTagName(s)[0];
  if (d.getElementById(id)) return;
  js = d.createElement(s); = id;
  js.src = "//";
  fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>

Part 2:

<div class="fb-like" data-href="{Permalink}" data-layout="button_count" data-action="like" data-show-faces="true" data-share="true"></div>

Note in part 2 that you manually have to change data-href to point to {Permalink}, which is Tumblr's way to refer to the current post.
Keep the window or tab open, or copy the code somewhere aside. Further down we'll see what to do with these codes in Tumblr.

Google Plus +1 button

Head over to Google's +1 Button page and configure the button of your choice. To the right appears the code for the button. In my case:

Part 1:

<script src="" async defer></script>

Part 2: 

<div class="g-plusone" href=”{Permalink}></div>
Note I added manually the href=”{Permalink} part, so the button will refer to the Tumblr post.
Keep the window or tab open, or copy the code somewhere aside. Further down we'll see what to do with these codes in Tumblr.

Twitter Tweet button

Head over to the Twitter Button page and configure the button as you want it. To the right ("Preview and code") you'll find the code. There's only one part. In my case:

<a href="" class="twitter-share-button" data-url="{Permalink}">Tweet</a>
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);;js.src=p+'://';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script>
Note again the data-url="{Permalink} part.

Get it all into Tumblr

Log into Tumblr and go to the HTML editor. (See the beginning of Tumblr's Custom HTML manual on how to get there, if you don't know.)

Part 1

Now paste part 1 of Google's and Facebook's codes just before the </head> tag. (You can push Ctrl+F in the Tumblr's HTML editor and do a search), as follows:
<!-- begin Facebook like button part 1 -->
<div id="fb-root"></div>
<script>(function(d, s, id) {
  var js, fjs = d.getElementsByTagName(s)[0];
  if (d.getElementById(id)) return;
  js = d.createElement(s); = id;
  js.src = "//";
  fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>
<!-- end Facebook like button part 1 -->
<!-- begin Google Plus button part 1 -->

<script src="" async defer></script>
<!-- end Google Plus button part 1-->
(In italic are comments added by me for readibility afterwards).

Part 2

Next, paste the parts 2 of Google's and Facebook's code, and the Twitter code, just before the {/block:PostNotes} tag. Put them in an unsorted list (<ul>) as follows:

<!-- begin facebook, google plus, twitter buttons --><ul class=”socialShare”>
<li class="socialShare">

<a href="" class="twitter-share-button" data-url="{Permalink}">Tweet</a>
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);;js.src=p+'://';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script>
<li class="socialShare">
<div class="g-plusone" href=”{Permalink}”></div>
<li class="socialShare">
<div class="fb-like" data-href="{Permalink}" data-layout="button_count" data-action="like" data-show-faces="true" data-share="true"></div>

<!-- end facebook, google plus, twitter, linkedin buttons -->


Finally, to make them fit nicely one next to the other and on the same line, without bullets, add the following CSS lines just before the </style> tag:

<!-- begin CSS for social share buttons -->ul.socialShare {
      list-style-type: none;
li.socialShare {
      display: inline;
<!-- end CSS for social share buttons -->


Click on "Update preview" top right of Tumblr's HTML editor. If your blog doesn't seem broken, click "Save" (otherwise just close the browser window or tab so changes will not be saved) and give it a try on your blog's page.
Remember to refresh the browser window, and to actually click on an article and check there: the buttons are configured to appear in the posts itself, not on the home page.

Good luck!

Disclaimer: If smoke comes out of your ears or computer screen or your car is broken during or after trying this, I decline all responsibility.

If you appreciated this article for some reason or another, please share it (see the buttons below), and, of course, don't forget to Flattr! (Why?)

P.S Many thanks to the author of this article! If you want to learn CSS, HTML and many more web stuff, check out, it's awesome.

Sunday, March 8, 2015

Copyright protection for digital artwork: my creative free solution


As a free, simple, quick and working method to protect yourself as a digital artist from copyright infringement, the following combination might be sufficient:
  1. Keep original files in SVG/RAW/... format and/or high resolution and never publish these anywhere. These can (help to) prove authorship, but not the date of creation.
  2. The day before publishing the work on the WWW, email the image to be published to yourself and/or trusted friends. This can not prove authorship, but it can prove that the work existed at a certain date.
Together, these two methods could serve as free and sufficient copyright protection. 
(For better protection, registration with US Copyright Office or similar official services remains of course the standard.)

The copyright problem for digital artists

I am aware of the "Poor man's copyright" myth. It is a fact that mailing a letter to yourself, or similar tricks, will not (necessarily) be of help in a court case concerning copyright.
However, I make digital drawings and have been searching for a way to achieve copyright protection which is

  • easy, no hassle
  • quick (I don't want to wait days or weeks until I get confirmation)
  • and free or very cheap

I know that official registration, as with the US Copyright Office, is by far the best way to protect one's rights. However, it's not free, and for the amount of drawings I make, this is not an option for me. Way too expensive.

Basic protection is enough (for me)

At the same time, I only seek a basic protection. The idea is to have fun making art and sharing it without becoming paranoid but, at the same time, without becoming an all too easy victim of fraud, theft or plagiarism.
It doesn't bother me if other artists are inspired by my style or themes. That's what art is all about. 
It doesn't bother me if someone puts a copy of an image of mine (found on my website for instance) on his or her blog/website/facebookpage/... as long as
  1. interested parties can clearly identify myself as the creator of the work
  2. a direct link to my website is provided
  3. the image is in now way altered
  4. if someone copies or shares the copy, my name and website remain identifiable
However, it would bother me a lot if someone would make fame or money using or claiming an image as his/her own that is actually made by me. Concerning money, I have a right to my fair share of possible gains. Concerning fame, it's just not right.
So I want to have a stick behind the door to beat the last category up in case I want to.

Copyright isn't the problem, proving ownership is

Let's get some things straight here.
In a lot of countries, including mine, the creator of a work automatically obtains copyright for that work. So it's not necessary to do anything to obtain the legal copyright. You just get it automatically by creating a work.
Thus, the problem isn't getting the copyright. It's proving ownership. If someone steals my work and claims to be the creator, how am I going to prove I made it, or made it first? It'll be his/her word against mine. So actually what I want is 
  1. some proof of the fact that I made the image, 
  2. and (in case of plagiarism especially) that I made it at an earlier date than him/her.
These two aspects don't necessarily have to be solved by one single method, so I came up with the following "two-step" solution.

I have the originals, not bad to begin with

I make SVG drawings. The original SVG drawing always remains with me and will never be published anywhere. I only publish bitmap exports, in fairly low resolution. So one stick behind the door I have, is this SVG file. I can always generate a bitmap export in higher resolution than my opponent in court, to prove I have a source he/she doesn't have. Not bad to begin with.

Free copyright registration sites: I'm not convinced

But concerning proof of the moment of creation, it gets trickier. Good solutions have to be paid. Free solutions are somewhat untrustworthy. I investigated a few sites that propose free copyright registration and found that there's a risk of them disappearing, becoming paid, or being sold. The last happened to in 2012, which didn't seem to affect it's workings but it might have, and to myfreecopyright according to this interesting and detailed post from 2012, entitled " Is Now An Official Scam".

An email to yourself: not enough, but not totally worthless either...

Anyone will tell you that email is not (necessarily) acceptable as evidence in court. However, that's the short and incomplete answer and if you dig into it, email still might have it's use for some aspects of copyright protection.
The detail to consider is the following. The fact that the email was actually sent from a certain account to a certain account on a certain date with certain content and attachments can hardly be denied. Service provider logs would be difficult to falsify, and email headers, retrieved from the service provider itself, would be considered reliable. 
However, it cannot be established beyond reasonable doubt that the person who owns the account actually wrote and sent the email (see for instance this long and complicated article). Someone else might have hacked the account, or used it while the owner went to the toilet and forgot to lock his/her account.
So, in short, in anything but a murder case, the court will probably accept that the email was sent at a certain date with certain content. It will only refuse to acknowledge X or Y as the author of the mail.
So, my (very personal) conclusion is: if I send an email to myself and my wife, on a certain date, with an image in attachment, this could be sufficient proof that the image in question did exist at that specific date. The email will prove that my opponent (the thief) is not the original author of the work and actually unmask him as a fraud. What remains to be established is the true identity of the author. Which, in my case, I can do using my original SVG file. (In photography a RAW file might serve the same purpose). So, with the combination of email and original SVG (or RAW/...) files, I might be reasonably safe.


My very personal conclusion is the following. In order to protect digital drawings from copyright infringement, the following two things might be sufficient:
  1. possessing an original version of the work in a higher resolution than any resolution ever published, or in a RAW/SVG/... format (which amounts to the same)
  2. proof that the image existed prior to the date the "thief" claims to have created it
The combination of these two (in themselves incomplete) protections would together prove I am the original creator.

Practically speaking: basic copyright protection in 4 steps

So, practically speaking, here's what I plan to do. Whenever I finish one of my drawings and would like to share them with the world:
  1. Never share the original SVG/RAW/... format with anyone. This original is to be kept, like the negative of a photo, purely private. It will be proof that I created the work, without proving when I created it.
  2. Make a low resolution (say, for instance, 1200 pixels on the longest side) bitmap export of my image
  3. Put a copyright symbol, my name, the year and a link to my website on the bitmap export itself. This way all those lovely, innocent people who like and share my images afterwards, will automatically share also these data. (I am regularly frustrated while surfing the triple w, finding great artwork without any possibility to find out who created them, and want to avoid that as much as possible with my own work).
  4. Before I publish this bitmap export, email it to myself (possible CC to trusted people) and/or copy it to Google Drive. This will prove it existed at that date, without proving who created it (but that's taken care of in step 1)
  5. Publish the work on the world wide web (maybe wait a day after mailing it, to avoid time zone confusion and other quirks).
I might add that for those few images I hold especially dear, I would still use a service similar to the US Copyright Office. But for the bulk of them, I'll just do as outlined before: keep the originals as proof of creation, and use email as a "datestamp".

If I stand to be corrected or you have any questions or remarks, please use the comments below!

If you appreciated this article for some reason or another, please share it (see the buttons below), and, of course, don't forget to Flattr! (Why?)

DISCLAIMER: I am in no way a legal expert and this article is not to be considered legal advice.

Saturday, February 7, 2015

How to configure Wacom Intuos Express Keys on Linux

I have a Wacom Intuos Pro Medium Pen Tablet (or digitizer) PTH-651 and had some trouble assigning the buttons (or "express keys") on Ubuntu Linux 14.04 LTS.

Finally I got it working so here is my solution, using xsetwacom. It's in the official Ubuntu repositories so you can install it from there.

Getting to know your device names, parameters you can set and modifiers you can set them to.

First off, you'll need to know how Ubuntu calls your Intuos. You can do this with the following command (in a terminal window):
xsetwacom --list devices
In my case the result is:
Wacom Intuos Pro M Pen stylus   id: 14 type: STYLUS  
Wacom Intuos Pro M Pen eraser   id: 15 type: ERASER  
Wacom Intuos Pro M Pen cursor   id: 16 type: CURSOR  
Wacom Intuos Pro M Pen pad       id: 17 type: PAD    
Wacom Intuos Pro M Finger touch id: 18 type: TOUCH
Then you'll need to know what kind of buttons and other stuff you can configure using xsetwacom. The following command:
xsetwacom --list parameters
gives you a long list of parameters you can use, with a brief explanation of what they mean. The parameter "Button" for instance will be used to assign a key to a button (or "express key" as Wacom calls it).

Lastly, you kneed to know what you can set these parameters to. The following command:
xsetwacom  --list modifiers
gives you the list of modifiers (keys really) you can set the parameters to. The modifier "PgDn" for instance will be used to set a button ("express key") to act as if you press the "PageDown" button on your keyboard.

Configuring your buttons ("express keys")

The "general" command for assigning a key to a button on my Wacom Intuos Pro is the following:
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 2 key "b"
The above command would set "button 2" of my Intuos to the key "b".

Seems simple enough, and it is really, except for the fact that the numbers of the buttons aren't really logical. To make a long story short, after a lot of trial and error I found that my buttons are numbered, from top to bottom:

1 (the big button in the middle of the Touch Ring)


In case they don't correspond for you, here's how I found them:

  • open a terminal window
  • type or copy/paste the following command:
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 2 key "b"
  • open a simple text editor like mousepad or gedit
  • instead of typing, push the buttons on your Wacom Intuos and see what happens in the text editor. The button that types "b" is button number 2.
  • Now continue doing the same for the other buttons. Just change the button number in the above command (from 2 to 3 for instance) and push again all the buttons (except for the ones you found already of course).
Finally, as an example, I configure my buttons ("express keys") as follows:
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 2 key "shift"
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 3 key "ctrl"
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 8 key "alt"
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 9 key "esc"
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 10 key "pgup"
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 11 key "pgdn"
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 12 key F1
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 13 key F2

Configuring the Touch Ring

Now you got the hang of it, the Touch Ring is a piece of cake. Just replace "Button 2" with "AbsWheelUp" and "AbsWheelDown" (one for each direction) and you're good.
In my case, I use:
xsetwacom set "Wacom Intuos Pro M Pen pad" AbsWheelUp key "="
xsetwacom set "Wacom Intuos Pro M Pen pad" AbsWheelDown button 7
Now if you pay attention, the modifiers I chose seem a bit weird, right? Why would I use "7" to zoom out and "=" to zoom in? Here's where it gets goofy. I have an AZERTY keyboard (be-fr) and xsetwacom doesn't seem to like that a lot. It actually treats it as if it were a QWERTY keyboard, but not completely either. So I had a lot of trial-and-error fun, again, trying to figure out how xsetwacom interprets the keys on my keyboard. I didn't actually work it out, I stumbled by chance on the right keys for the zoom and left it at that.

Turning off touch

To turn off the "touch" reactivity of my tablet, I use the following command:
xsetwacom --set "Wacom Intuos Pro M Finger touch" touch "off"

A note on Inkscape and pressure sensitivity

I couldn't get pressure sensitivity working on Inkscape. Seems to be a bug in overlay-scrollbar finally. Apparently you can get around it by starting inkscape as follows from command line:
but that didn't (always) seem to work for me.
Finally I just removed the package "oevrlay-scrollbar" from Ubuntu. Pressure sensitivity works fine now.

Using your newly configured buttons

To use your buttons with the xsetwacom configurations, you need to first plug in your Intuos (otherwise the device name will be unrecognized by xsetwacom) and then, in a terminal, type your xsetwacom commands. The settings are lost at reboot.

If you don't like hassle, like me, you can just make a small text file where you keep the commands. If you put them all in a single line, separated by "&&" (see axample below), you can issue it as one long command.

I my case, the final command is:

xsetwacom set "Wacom Intuos Pro M Pen pad" AbsWheelUp key "=" && xsetwacom set "Wacom Intuos Pro M Pen pad" AbsWheelDown button 7 && xsetwacom set "Wacom Intuos Pro M Pen pad" Button 2 key "shift" && xsetwacom set "Wacom Intuos Pro M Pen pad" Button 3 key "ctrl" && xsetwacom set "Wacom Intuos Pro M Pen pad" Button 8 key "alt" && xsetwacom set "Wacom Intuos Pro M Pen pad" Button 9 key "esc" &&
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 10 key "pgup" &&
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 11 key "pgdn" &&
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 12 key F1 &&
xsetwacom set "Wacom Intuos Pro M Pen pad" Button 13 key F2

Or you can make a shell script, of course. You can find all about that in the linuxwacom Tablet configuratio Wiki.

Good luck and have a nice day!

If you appreciated this article for some reason or another, please share it (see the buttons below), and, of course, don't forget to Flattr! (Why?)