FX > Outline tool Quirk

[dacap]

Hi @Blue it’s highly probable that you have the “All” button selected, check this post:

Replace Color: Where is the "Apply to all frames in the active layer" button?

I’m preparing a fix to this (bringing back a simpler version of the button), but at the moment you can select all layers and use Replace Color to replace the color in whole sprite. (You can Shift+click the layer where you want to see the Preview too.) [51] [58]