Please help-switch to dimmer

[Gregthomas]

I HAVE A LIGHT SWITCH WITH TWO SWITCHS ON (ONE FOR 2X MAIN LIGHTS IN LIVING ROOM, THE OTHER SWITCH FOR THE 2X WALL LIGHTS, ALSO IN LIVING ROOM) AND WANT TO CHANGE TO CHROME DIMMER, THE INSTRUCTIONS ARE AWFUL. I AM IN NEW HOUSE SO ALL WIRES ARE RED (APART FROM GR/YL WIRE WITH RED SLEEVE).
cAN YOU LET ME KNOW HOW TO TRANSFER WIRES OVER TO CORRECT PORTS, CHEERS GREG

 

[breezer]

mark each cable with a felt pen, a, b, c etc, make a sketch of the switch noting which wire goes into which terminal(s) then check the new sitch to see that it has the same terminals on the back , then swap them over.

If you can turn the lights off from else where you must have a two way switch.

If you only turn them off from one place you do not need a two way switch, but the new one may be two way. If so you only need to use C and L1 (although there will be two of each since there are two dimmers