+Go to the container marked with above example:
+-----------------------------------------------------
+i3-input -F '[con_mark="%s"] focus' -l 1 -P 'Go to: '
+-----------------------------------------------------
+
+== ENVIRONMENT
+
+=== I3SOCK
+
+i3-input handles the different sources of socket paths in the following order:
+
+* I3SOCK environment variable
+* I3SOCK gets overwritten by the -s parameter, if specified
+* if neither are available, i3-input reads the socket path from the X11
+ property, which is the recommended way
+* if everything fails, i3-input tries +/tmp/i3-ipc.sock+
+
+The socket path is necessary to connect to i3 and actually issue the command.
+