Any setting to skip pressing of enter/space to select _underbar items in command?

Rhino Rhino for Mac
1

For example, in ExtractIsocurve, when toggling direction U or V
currently pressing “t” then “space or enter” to get the toggle going.
Can this be set to be done in one step? Just pressing t-key?

2

Hi Toshiaki - you can use _Enter in macros.

-Pascal