gtol

   'gtol' [RETURN]|<auto>|<geometric-tol>

This keyword is used to enquire the default geometric tolerance:

gtol

Or it is used to recalculate the geometric tolerance:

gtol auto

Or it is used to set the geometric tolerance:

gtol 0.1

The merg command will recognize points or nodes as equally located when the distance between them is less than gtol.

The command writes to the ”stack”.