Make a Thumbnail Image in 3 Minutes
Shrink a larger picture down to a thumbnail or icon size.
The Crop tool allows you to Cut off the unwanted edges of your pictures. After that, see how to resize your image bigger or smaller with image scaling.
See how to put layers in a straight line on your canvas. If you have small layer shapes like circles, you will need to make sure the layer border is reduced to the edges of the shapes (using autocrop).
Take a photograph or website snapshot look like a piece of paper that is laying down.
An example of using bline tool to trace an anime image that was imported into synfig.