?	Show all keybindings
g	Update buffer (prefix arg does hard reset)
b	Select a different property to group by
RET	follow link to buffer on this line
d	Mark buffer for deletion
u	Remove mark
x	Delete marked buffers
o	Like RET (see variable org-buffers-follow-link-method)
.	Like RET but switch to buffer in same window
h	toggle between headings and plain entries for buffers
p	toggle in-buffer properties on/off
c	Switch to column-view