Testing Widget Functionality in UMG Editor

I somehow accidentally activated a simulation of sorts for UMG Widget Editor. I am not referrring to the actual “Simulate” Game Mode and Play Button in Editor.

This was something different, and I have no idea how I activated it. I have deactivated, only to realize I had encountered a feature I never knew existed, and now I cannot figure out how to activate it again.

When enabled, widgets hover states etc. would activate in editor, and I could still edit the Widget. I noticed while in this “mode” some widgets I had to right click to select as nomal left click would not select them (such as buttons).

This was great for testing widget behavior, as I used to start a standalone game to test my widgets, which is now annoying knowing I dont have to.

Anyone have a clue what I am talking about and how to activate it again?