Keyboard shortcuts let you use the keyboard to navigate the Topicbox interface, without needing to use the mouse.
General navigation
space : scroll down a page at a time.
shift-space : scroll up a page at a time
u : up, navigate to previous screen, from topic view to group view, group view to all groups
shift-esc : mark all messages as read
Group page
/ : start a search
esc : cancel search
j : focus on next topic
k : focus on previous topic
o or enter: open message with focus
u : up, navigate all groups page
Topic page
j : go to next topic
k : go to previous topic
n : go to next message in this topic
p : go to previous message in this topic
u : up, navigate to group page
r : reply to topic thread