When certain Foundry stack types such as Header are selected, they change color from gray to an obvious blue. When the stacks are in hide mode it’s easy to detect you’ve selected them.
With stacks such as Group they do not change color when selected. When they are in hide mode it’s impossible to tell they are selected. When not hidden this isn’t a problem because the corner icons appear when selected.
It would be helpful if all stacks had an obvious color change when selected.