Minolta X-370s Instruction Manual page 31

SHUTTE
effect that you want makes the
shutter speed more important. To
set a desired shutter speed when
using auto mode, turn the lens'
aperture ring until the LED next to
the desired shutter speed lights.
Fast shutter speeds such as 1/500
or 1/1000 sec. can "freeze" action
(example A). Slow shutter speeds
such as 1 /2 or 1 sec. can be used to
emphasize subject flow or motion
(example B).