Xara Tip of the Day:
You can copy the fill colour from the selected object to any other object. Drag the 'current fill colour' patch from the left end of the Colour Line onto an object.
Now this is very useful.
Xara doesn't cover it in its Help file.

Nor does it mention you can use Drag to bring the Line fill colour across.

Nor does it mention the Start and Stop colours of a Fill can be dragged.

Nor does it mention you can drop any of the dragged colours onto a Line of another Shape.

Nor does it mention you can do the same with the patches in the Colour Editor (top right).

Acorn