Auto-Arm Buttons

[Sivakatirswami]

I must be missing something... I seem to have forgotten and now it is  
not obvious to me, how to auto-arm a button so that it changes on  
mouse within (automatically) reversing the type and background.

I don't see auto arm in the IDE props palette and if I set auto arm  
to true in smart props to true it still doesn't happen, but the  
button suddenly went from standard (round rect) to square!

I missing something here.

[Dan: native button states would be a great thing to add to SATSOT]

Sivakatirswami