is a bigger digital canvas better ?
Kind of… It depends on what you intend to do with your work though. Like, if you’re planning to make a print out of your drawing, then you want to work at a higher resolution. If it’s just a quick scribble for practice, then it doesn’t matter.
(Please see [printing] for posts about working for print.)
As for why… basically, the computer doesn’t know how to draw without you holding it’s hand every step of the way. So, if you try to scale an image up, the computer simply fills in the missing information with copies of pixels that are already there. This results in a blocky/pixelated image that doesn’t look very good as a print.
Meanwhile, scaling a larger image down doesn’t cause this same problem because rather than attempting to add information, the computer just has to subtract existing information.
Note that this only applies to rastor based art. [Vector art] can be freely scaled up and down and all around, without any loss of data because it’s all based on math and plotting lines and stuff. Computers love math and plotting lines and stuff.
Especially stuff. Stuff is the best.