Render paused when "Rendered" selected in 3D viewport

I’d like to know what I did to cause the situation shown below, and also how to Undo it!

  • Bill

I guess you clicked here:

Not sure if there is a shortcut for it that you might have accidentally pressed.

Yeah, that was it. Thanks IkariShinji – I guess I’ve never needed to pause a viewport render in the last 5 years!