Bumping a very old thread here, hope this is allowed. This was the only support I could find for this app. I think op means once you import an image to Sketch you can't seem to erase any part of it (ie to erase the background from an object in an image) . I think this is a bug. When you try and use the eraser tool nothing happens and when you try and use a normal pen tool, as soon as you touch the screen it will draw into a new layer instead of the same layer as the photo. Perhaps it is also trying to erase from a different layer from the photo also? . Any advice?
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