This is a thread for little tips and tricks for PDN you would like to share.
1. When drawing a line with the line/curve tool :LineCurveTool: , right-clicking the handles will make the curve a bézier curve (look it up on Wikipedia if you don't understand what it is).
2.To remove the white in a picture, use the alpha mask plugin without loading any image, with invert selection on. Duplicate this layer a few times.
Examples:
You can see the background of the shape is white.(255 luminosity)