Slide advancement by solely pressing the Enter key. (SL2 does / SL3 does not)

Greetings. I want the users to see a slide and have them advance to the next slide solely pressing the Enter key.  I set the trigger, but it only works if the user first clicks on the slide (as the slide is not in focus).

SL2 had no issues with focus.  I suspect this is more of SL3's Accessibility making my life harder.

Thought i would post this here to see if anyone has figure a workaround.  [ ref:_00D30Txo._500f31Cz3TV:ref ]