Playback Speed /2
Playback Speed /2 (Alt+2)
The Speed /2 command divides the current playback speed factor (for all
playbacks) by 2, provided the resulting playback speed factor is not less than /1000.
If it is, the resulting playback speed factor is set to /1000. /1000 is 1000
times slower than real-time playback.
Quick Tip: The Speed /2 command can also be executed from the toolbar menu.