Key	Functionality	Note
TAB	cycle visibility of subtree	w/ C-u C-u, restore initial
S-TAB	cycle visibility of buffer	w/ C-<NUM>, to level NUM
C-c TAB	show just children
C-c C-k	show just branches
C-x n s	narrow to subtree	widen with C-x n w

Point stays in place after S-TAB, so to fold everything but the heading at point, type S-TAB followed by TAB.

Indirect buffers and sparse trees:

Key	Functionality	Note
C-c C-x b	open tree at point in indirect buffer
C-c /	create sparse tree …	quit with C-c
C-c / t	create TODO sparse tree	quit with C-c

Use completions to quickly navigate to any heading with org-goto.