Panasonic Lumix DC-S1 Owner's Manual page 245

You can register functions to Fn buttons:
0
[ ] [
Mode] (l 279)
You can set the upper and lower limits for ISO auto when recording in Creative
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Video mode.
[ ] [
Operations During Video Recording
Change the exposure and audio settings with touch operation to prevent
operation sounds from being recorded.
With the default settings, the Touch Tab is not displayed.
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Set [Touch Tab] to [ON] in [Touch Settings]. (l 333)
1
Touch [ ].
2 Touch an icon.
F
Aperture value
SS
Shutter speed
Exposure compensation
3
Drag the slide bar to set the item.
[ ]/[ ]:
[ ]/[ ]:
If you touch icon (A), the screen of Step
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2 is redisplayed.
The shutter speed can be set within a range of 1/25 of a second to 1/16000 of
0
a second.
] [Fn Button Set]
] [ISO Sensitivity (video)] (l 319)
Changes the setting slowly.
Changes the setting quickly.
[Setting in REC mode]
ISO
ISO sensitivity
Sound recording level
adjustment
11. Recording Videos
[Exposure
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