ℹ️ My pictures are deliberately low quality as they are basic shapes that when upscaled can still be seen / don't need detail for basic shapes...
Last picture was 4KB! Tiny.
Could have been 40KB (which is medium perhaps and ok) or 100's of Kill-o-bytes :D

ℹ️ So for small 'lessons', tips or video quotes I really suggest crap quality so Fediverse is that much lighter... faster and easier to backup...

ℹ️ Wordart or basic shapes do need not high res and almost the opposite is better.

ℹ️ If you every want better resolution, just ask! Most are from absolutely royalty-free sites like pexels.com and reduced.