You can select separate measurement units for Office Writer, Office Writer/Web, Office Calc, Office Impress and Office Draw documents.
Open a document of the type for which you want to change the measurement units.
Choose Tools - Options.
In the left pane of the dialogue box, double-click the application for which you want to select the measurement unit.
Double-click Office Writer if you want to select the measurement units for text documents.
Click on General.
On the General tab page, select the measurement unit. Close the dialogue box with OK.