WPF Animation – From property

When you are doing a WPF animation, with a storyboard, the From property lets you specify the starting value.

It means you can start the animation with a different value than the current value.
You may want to do that so that you can control the starting value, or if you are doing a cumulative effect.

Alternatively, you may simply want to have the effect of shrinking first, then expanding, like the following example: