you know, widgets with images or stuff you draw on it. for puppet making. i couldnt figure it out. 

Importing an image as a widget is easy enough, but non-obvious. Follow these steps:

1. Import as usual, from the menu or with drag&drop;
2. Hit Ctrl-X right away;
3. Switch to Widgets mode from the Tool menu;
4. Pick Edit->Paste as new canvas.

(Turns out step three is key, and not mentioned in the manual.) Hope this helps!