Quote:..With Gimp, the most part of time I works on photos to simply add extra layers and export the result (maps, explanations, mechanisms, and so).....snip.....
....Extra question, is there a way to attach a file to a XCF project (I suppose no) like we usually do it with the email attachments method ? I hoped this could be achieved with an add-on ...
As Ofnuts - new features in Gimp 3.1.4 development version - and there is an appimage for linux to try out https://download.gimp.org/gimp/v3.1/linux/
If you can keep mainly to vectors (paths, arrows, text, svg shapes ) then it is possible to make an editable overlay with a small file size. This example - the base file is 5.4 MB and the overlay is 26 KB
For what its worth a 2 minute demo: https://i.imgur.com/nTY5rdS.mp4
The only snag at the moment is you need to load the overlay first otherwise you lose the original path (s) That might just be an oversight by the developers.