You
can modify gradients by adding colors to create multicolor gradients,
and by adjusting color stops and midpoints. It’s a good idea to
fill an object with the gradient you plan to adjust, so that you
can preview the effect on the object while you adjust the gradient.

You can modify gradients pasted from Adobe Illustrator,
provided that the gradient was pasted using AICB (Adobe Illustrator
Clipboard) format. (See
Pasting Illustrator graphics into InDesign.) To select the gradient, use the
Direct Selection tool.
Note: If you edit a color swatch, any
gradient stops that use that swatch will update accordingly, changing
the gradient.