Mouse Control

I have a chat window that allows me to input text. and if I click outside it, it gives me “mouse control.” If I click shift + F1, I regain control of the chat window. How do I change the key press from shift +F1 to, say, space bar? Or better yet, how do I turn off mouse control and just use the chat window-- at which point I could then use the level blueprint to implement key presses to bring up new widgets.

I think I am correct in this, but you’ll have to do some testing. Also keep in mind that there are multiple solutions to your issue.

The shift + F1 key is a set standard key in Unreal Engine to regain the ability for the developers to have their mouse cursor showing up. I am not unsure if it even works in the packaged game for users. So basically, you will need a proper solution to fix this.

You could have a key event, so that when you press space bar the widget chat window runs a function to focus on a particular element in the UMG Widget. This is the setup in the widget:
bild

This is the Level Blueprint:

If you are still experiencing issues, try to add this node Set Input Mode Game And UI: