Hi. This link helped for me while waiting for the best solution (disable key shortcuts to take a screenshot).
Basically, you activate the Accessibility Menu in settings and assign a gesture to it. Then you lock the phone dragging from the screen bottom with two fingers and click on lock.
There is an option to deactivate the screenshot shortcut now introduced by 
today’s software update: Settings > System > Gestures > Screenshot shortcut
works. finally. done with the screenshots in the camera-roll
I guess I can close the thread ! Thanks for the update !!
Just for clarification:
If you disable the power+volume button shortcut as @urs_lesse wrote, screenshots can still be taken from the app overview (where you switch between open apps, from the square navigation button or gesture).
Happy to get rid of that screenshot feature, but how do we take screenshots, now? I mean, wouldn’t it be better to replace that combination of buttons, which made no sense, with another gesture?
Thanks, but the option to take a “longer screenshot” is not available in that case. Am I missing something?
I can confirm this. Both with and without the shortcut, a longer screenshot does not seem to be an option.
With the gesture I actually see an option to do it - of course, only if the screen on display is long. Webpages, for example, work pretty well. But that extra button is not there if I take the screenshot from the carousel of windows.
For the time being I cannot remove the (annoying, yes) gesture.
Fairphone: could you not give us the option to take a screenshot with volume up + power? Pressing those two by mistake is pretty difficult, isn’t it?
After a reboot, I also got the “Capture more” button back – when the shortcut is activated. With the shortcut deactivated, the reboot does not help, “Capture more” is indeed missing.
Hi All,
I have some good news!
The latest Android Update has a feature which able to disable the screenshot creation:
https://support.fairphone.com/hc/en-us/articles/24463713641234-The-Fairphone-Gen-6-Release-Notes
I’ve installed, tested it, and it works.
Enjoy!
Welcome to the forum.
Good news indeed. Thanks for your feedback.
Do please read above.
I was wondering, how to take a screenshot if I disable the power+volume down shortcut?
Hello
I moved your post here
I just noticed that you can now delete a screenshot directly after you take it (in the menue appearing) , so this makes it even more convenient 
I would love this would be the case for me. I am getting crazy taking screenshots by accident all the time.
I entered the forum to see if someone knows how to disable screenshots with power+volume down.
I guess we have exactly the opposite problems.
That is truly amazing! I am so happy to have a FP right now.