Fluidmaster Push Button Cable Dual Flush Valve instructions

[mattylad]

Hi folks, I have a Fluidmaster Push Button Cable Dual Flush Valve fitted in my loo.

I cannot remember what I did with the instruction sheet.

At the bottom of it there is a slide up/down feature, can someone please advise what it does?
And what it does when up or down.

Cheers.

 

[seco services]

The one at the bottom is for full flush.
Move up to reduce down to increase.

 

[Charnwood]

For future reference:
http://www.fluidmasteruk.com/instructions/9/7/5/2/9752aa2b-39d7-4c44-a1d9-d919576bb6fb.pdf