Currently, changing between the following Thickness 'Helpers', for example:

Margin/Padding/BorderThickness: Uniform | 2 Sided | Individual
or
CornerRadius: Uniform | Individual

Any changes made to these 'helpers' are not included in Studio's Undo/Redo stack.

This can sometimes cause some friction as although these helpers don't change anything in the XAML itself, from a user perspective, they are still changes made, and can sometimes result in unexpected results when undoing or redoing Property changes associated with Thickness properties.

Ideally, a change between these modes would be included in the Undo/Redo stack for there to be a 1:1 mapping between what actions a user performs in Studio, and what is in the stack.