I am using the 2D Animation function of blender. I have Grease Pencil lines drawn on a number of layers and I am trying to fill the area inside these lines using the Fill Tool on a new layer. However the fill tool seems to ignore the lines and fills the whole visible screen. What is strange is if I zoom out the window the fill tool will work sometimes, and other times it fills the whole screen again. This is seemingly at random.
For the life of me I can't figure this out. I have tried "construction" lines, drawing on the same layer as the grease pencil lines, using shift-click with the fill tool, changing the Leak size, the material thickness, watched tutorials. The strangest thing is the tool worked completely fine in another project, but this is the second project I have created that has this problem. I even updated from 2.9.01 to 2.91.
I am sure I am messing something up in the settings. I am still new to blender. But this is driving me crazy! Please help!