Reply to Kitter: It's when I click Preset 3, as that is the folder I've put my files in.
Reply to Dark_Heart: I used Ibis paint on my phone, I'm not good at mouse drawing and can't afford a drawing table either. It works like what's need and downloads files as .png and I just change them to .jpg later down the line.
Reply to QuietMacaroni: I use Ibis Paint and made sure every thing was 512 × 512, though I'm a little confused by the coding part, I have no idea what to do with that, but I haven't messed with it.