How can I get the keyboard input in UMG uionly model

Development Programming & Scripting UI
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In my case,I need to do a key rebind system with UMG.

but when I setup the ui and set the UIOnly model. I can not receive any input event to rebind new key.

how can I get the input in uionly model.

I tried to use editbox but it just can recieve limited word. like a-z but not space,ESC and so on.

So does anybody know how to get the input under uionly model