In the past I used a linux distribution which is called SolydX. It is debian based as well and I used an application called “Shutter” to easily take screenshots and edit them further (mark something in the screenshot, add arrows, etc.).
Unfortunately this package is not available in the PureOS repos.
apt-get install libgoo-canvas-perl
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libgoo-canvas-perl is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'libgoo-canvas-perl' has no installation candidate
Any advice how to safely install it and keep it up to date?
Or is there any simple screenshot taking and editing application you can recommend which I can use instead (sure gimp works somehow as well for such tasks, but it is not as specific and simple for the the things I mentioned)?
So since PureOS is based on Debian testing, anything in the Debian testing repo (with the exclusion of non-free software and contrib) is going to in the repo. It looks like libgoo-canvas-perl is not included in the Debian testing repos from the Debian website, so therefore it isn’t in the PureOS repo. Either you’ll have to wait for the package to pass through sid and into testing where it will be added into PureOS, or you could take a gamble and install the stable (stretch) .deb of the package and hope it works.