b7078d22____Audacity_Development_Manual__Shortcut
[Button] Loop-Play [What it does] Play the entire selection repeatedly (or the entire track if no selection) until stopped. [Shortcut] 
SHIFT + SPACE
P
S P A C E
S H I F T + S P A C E
H O M E
E N D
R
S H I F T + R
Playing and Recording - Audacity Development Manual
Shortcut