Issue in generated Gcode

I’m new and testing this software.
I tried one design with 8 layers one at 1000 100%
Second at 800 100 % µAnd one cut 400 100%
In the generated GCODE all moves G1 are at 1000.
So it engrave but never cut.
begin of file I have one F for the speed :
But after it is never changed and so I should cut ad engraving speed…
How to have the right layer speed in my Gcode ?

I was in mm/s in stead of mm/min