Usage: i3finder [options]

Options:
   -d, --dmenu             The dmenu command and arguments, useful if you have an alternative to dmenu  [dmenu]
   -w, --workspacePrefix   Workspace displayname prefix (to tell them apart from other windows)  [workspace: ]
   -s, --showScratch       Show scratch workspace in list
   -t, --dontTrackState    Dont bother saving current state (state is used for the back action)
   -i, --i3msg             Command to execute when using msg action. Use this to save state, then message I3 directly to do something
   -a, --action            Action to perform.  [focus]

I3 finder is used to focus or move i3 windows and workspaces. If the action argument is not specified, the chosen item is focused. The dmenu, and workspacePrefix arguments already have reasonable defaults, but are used to customize the look of the choices in dmenu. 

Besides focus, the other available actions are:
move: grab and move a selection to your current area.
focus: focus a selection
back: go back to the last saved window configuration and exit
save: just save current configuration and exit
msg: save current window configuration, then execute i3 window msg directly. Requires i3msg argument