Canon Speedlite EL-5 Advanced User's Manual page 19

(1)
(2)
(1) < > Receiver fully charged
(2) Firing group control
(3) Sender / receiver charge indicator
(4) < > Modeling lamp indicator
(5) Group firing mode*
* 1: < > Group firing only
Note
< > is no longer displayed after senders and receivers in radio
transmission wireless flash photography are fully charged.
< >, <
for < > group firing.
As an indicator of modeling lamp illumination commands, <
control information does not necessarily correspond to the current status of
receiver modeling lamps.
1
>, < >, and <
19
> are available as flash modes
> on firing group
(3)
(4)
(5)