01-22-2021, 01:53 PM
Not too sure how you got to the layers you have, there is more than one way. However, look at your background layer and that dotted line. That is the layer boundary and is the reason you cannot paint / fill outside it.
To fix it, with the background layer active (as shown on your shots) apply Layer -> Layer to image size That moves that right side boundary. If the background layer has no transparency (alpha channel) it will fill with the current BG colour. If the layer has an alpha channel use the bucket fill as normal.
40 second demo: https://i.imgur.com/CtBauI9.mp4
To fix it, with the background layer active (as shown on your shots) apply Layer -> Layer to image size That moves that right side boundary. If the background layer has no transparency (alpha channel) it will fill with the current BG colour. If the layer has an alpha channel use the bucket fill as normal.
40 second demo: https://i.imgur.com/CtBauI9.mp4