Speed problem in lightburn

Yes I use the Uccnc laser version.

But you speak about $ settings where I can change values is there a tutorial for what settings what is ?

Yes I have uccnc, but I use a very simple gcode generator software also made for laser only and there in if I change the speed value then he respond on it also In photo mode but when I do it in lightburn he does not respond on every lower or higher speed change I make in the lightburn software.??