What are M S settings?
The m and s settings are settings determining size of medium and small images on the xz1. You are not likely to need to bother with them at all.
The other two posters are referring to two of the exposure modes , manual exposure and shutter priority.
'It is nice to be important but it is more important to be nice'
|Moorhen Steps by Nader El Assy|
from Get moving
|Morning frost by Kaappo|
from Letterbox format (2:1 ratio at least)
|Boulders and the Milkyway-4483 by vbuhay|
from Adrift in space and time - our place in the Universe