Locked setting

[Anonymous]

Why there is a lock on this setting? And how do I unlock it?

[Jeew-m · Accepted solution]

Dear Friend,

It depends on the region of 'Units and Zone'. When you change the zone this unit changes. So it is a part of the coordinate system. It is dependable and thus locked. 

And hope Dave (pointdump) would come up with much better explanation.

Thanks

[Pointdump]

Akbar,

As Jeewana says, it locks to the units of your chosen Coordinate System.

It also locks to the units of whatever template you choose to open a new drawing. The only way to change it is to assign a Coordinate System that uses different units.

Dave