When you want to
Solution
Go to the system of measurement settings
Open the Settings Editor and go to: [Preferences] → [System settings] → [Regional settings] .
Change the system of measurement
Go to [System of measurement].
Select [Metric] to work with g/m2 and mm. Select [Imperial] to work with lb and inch.
Click [OK].
Change the media weight notation
Go to [Media weight notation].
Select the media weight notation you require.