Artboards , Custom grids and Layer masks
Recently I was trying to create a group of separate but connected images as "mosaics", to be used on instagram, a post of 3x3 images. Each image can be a independent post, with different elements but with some others connected to each other, this makes a pretty nice visual effect. Unafortunately make this in Lazpaint is not really confortable.
Some examples here: https://www.plannthat.com/7-instagram-grid-layouts/
A short video about Photoshop artboards: https://www.youtube.com/watch?v=sa2TERSa30s
Photoshop have in addition to the Layers, it has Layer Groups (I think this has already been commented/requested in some issue) and Artboards, this last one make this kind of things really much more pleasant to do.
Something that I have also seen only a little but looks to be very useful are the "Layer masks" Where any object/image coming out of the main canvas to another can be hidden on the desired canvas.
Another nice option to have also can be something to split a image in parts, maybe selecting how many rows and columns.
related issues (maybe) https://github.com/bgrabitmap/lazpaint/issues/68 https://github.com/bgrabitmap/lazpaint/issues/101 https://github.com/bgrabitmap/lazpaint/issues/107
Well, layer groups and layer masks are indeed related. Now of course, a specific art board feature would be great in theory.