To get more grip on using Grease pencil, I followed an online tutorial. It was more of a click here and do this, than an explanation of what we are doing. I encountered also a strange behavior with Grease-pencil. You can draw on layers. You can lock those layers. But even when the layer was unlocked, I couldn’t edit the graphics (verts) inside. Took me some investigation on the web. Strangely I had also locked the pencil colors used in that layer. So the fills, and stokes created with this
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