Thats simple to do...
Select your text, or object you want to fade
Open Object Properties (Under Edit) ((Ore Alt + Enter))
Select the Paint Bucket (Fill) tool
You will see some options for different fills, solid, vector, bitmap, and fountain
Select Fountain
There you can select all sorts of things and have fun with, as well as set your colors and where you want the color to be on the text.
You can also make a customized color fill, where you have lots of different colors in the object
Select your text, or object you want to fade
Open Object Properties (Under Edit) ((Ore Alt + Enter))
Select the Paint Bucket (Fill) tool
You will see some options for different fills, solid, vector, bitmap, and fountain
Select Fountain
There you can select all sorts of things and have fun with, as well as set your colors and where you want the color to be on the text.
You can also make a customized color fill, where you have lots of different colors in the object