The syntax is
bind <keymap> <key> <request>
Keybindings are resolved by first looking in the keymap of the active view,
then in the generic keymap, and finally in the built-in default keybindings.
Examples to put in ~/.tigrc:
bind main w scroll-line-up
bind main s scroll-line-down
bind diff a previous
bind diff d next
bind diff b move-first-line
bind generic g view-next