ENTER marks the begin and/or end of an annotation. The annotation is created on the active, editable tier.

UP select the tier that is above the current tier in the list of tiers

DOWN select the tier that is below the current tier in the list of tiers

DELETE deletes the annotation under the mouse pointer (highlighted in green)

BACKSPACE deletes the annotation under the mouse pointer (highlighted in green)

CTRL+SPACE start/stop the step-and-repeat playback mode