How to limit gradient to an area

Hello,
By default gradient applies to entire canvas. How can I limit gradient to an area (that is within a circle, a splin, …) ?
Thanks

Hi and welcome bjonk,
the answer is in the wiki :wink:
wiki.synfig.org/Doc:Object_gradients
Hint: In Synfig, grouping and the order of layers within are a lot important :mrgreen: