A..2 Trees

Space:
Play (music or sound effects) or Show (Picture)
Ins:
Add
Del:
Delete
+:
Unfold
-:
Fold
F2:
Simple edition
Ctrl+F2:
Complete edition
Ctrl+F5:
State None
Ctrl+F6:
State In progress
Ctrl+F7:
State Failed
Ctrl+F8:
State Succeeded