Locking and unlocking parameters
A variable's lock status can be viewed and modified from the Properties Explorer, the parameter table, or the sketch.
- In the Properties Explorer: Click the
Lock icon in the Selected Parameter area to
lock
and unlock 
the parameter.
-
In the parameter table: Click the icon in the "L" (Lock status) column to lock
and unlock the parameter. 
- In the sketch: Right-click on a locked or unlocked dimension and select Lock/Unlock from the shortcut menu to toggle the lock status.
If a parameter is derived from the result of an equation or dependency
on other dimensions, the lock status displays an derived symbol 
in
the Lock column. You cannot change a derived lock status using the methods described above; however, unlocking one or more driving parameters will unlock the associated derived parameter. You can then change which parameter
drives another, as described in Driving parameter
values.
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