Shutter speeds when the flash fires, X-sync, Slow limit) – OM SYSTEM OM-5 Mirrorless Camera with 12-45mm f/4 PRO Lens (Silver) User Manual
Page 346: Custom, Menu, Slow limit, X-sync.] (p. 346), Custom menu, Slow, Limit

Shutter speeds when the flash fires (
A
X-Sync./
A
Slow Limit)
MENU
Q
C
Q
F
Q
[
A
X-Sync.]/[
A
Slow Limit]
You can set shutter speed conditions for when the flash fires.
Shooting
mode
Flash firing shutter speed
Upper limit
Lower limit
P
The camera automatically sets
the shutter speed.
[
A
X-Sync.] setting
[
A
Slow Limit]
setting
A
S
The set shutter speed
No lower limit
M
346
Shutter speeds when the flash fires (
A
X-Sync./
A
Slow Limit)