Are you asking how it is done in router?
It can be routed manually.
I am not able to route it manually as it is defined as LVDS pair. If I move one trace the other follow the same routing with clearance which is defined for LVDS pair. My question is how to route making a look only in one signal in LVDS pair, the other should stay away at same position.
Sure it can be done.
zig zag can be added to any route to match length,
Type DRO (Design Rukes Off) and manually fix it.
This I know as I have done zig zag on one signal while the other signal remain straight but there is a limit on it, the option of zig zag can not make a big loop on one signal and leaving the other straight.
Could you please tell me how to enable DRO ?
It's a mode less command, type DRO/enter.
Check all the mode less command under Help