I can’t seem to find anything that explains what the black photo corners are in the frame number layer. I thought it might be a playback selection, much like video editing apps, but they don’t seem to affect the playback.
Anyway: When the mouse hovers at the top of the frame numbers, the cursor transforms into a double-side arrow. If you click and slide right or left with this arrow, you can stretch or compress the bounding box created by the four black triangle corners — they look like photo corners (for an old-fashioned photo album).
What is this selection for? What’s it called? It’s not stopping my workflow right now; just an itch I need to scratch. I’m new to Aseprite and read the website documentation and watched tutorials. Thank you!