To set working units for the current project, use the dialog box at Options > Project Preferences > Working Units.
Use the controls of this dialog box to set a project standard for such units as length measurement and angle units.
Note: This dialog box allows you to set different length measurement units for editing Layout Book items (Layout Unit) and Model items (Model Unit).
Note: Length measurement units for ArchiCAD dimensions are set in the Dimensions Preferences dialog box, at Options > Project Preferences > Dimensions.
Model Unit: Click here to select from various standard Length Measurement Units used in the Coordinates Palette, Control Box and dialog boxes when editing Model views.
Decimals/Fractions: Click this drop-down list to select the number of decimals or the size of fractions for the chosen Length Measurement Unit.
Note: If you change the Working Units (for example from metric to imperial), some of the other default values such as grid spacing or default element sizes may need adjusting for meaningful, round values.
Note: The Length Unit entered here does not apply to Dimensioning functions. To set Dimension units, use Options >Project Preferences > Dimensions.
Layout Unit: Click here to select from various standard Length Measurements units for all editing functions associated with the Layout Book (e.g. Layout size, 2D drawing elements added to Layouts, Title size, etc.).
Decimals/Fractions: Click this drop-down list to select the number of decimals or size of fractions for the chosen Length Measurement Unit.
Angle Unit: Click this drop-down list to select from various standard Angle Measurement Units.
Decimals/Accuracy: Click this drop-down list to select the number of decimals or degree of accuracy for the chosen Angle Measurement Unit.
Note: Surveyor’s Unit angles are measured from the North direction (set in the Options > Project Preferences > Project Location dialog box). Every other angle is measured counterclockwise from the horizon.)
See Project Location and Project North.
Angle & Text Size Decimals in Dialog Boxes: Click this drop-down list to set the number of decimals displayed for Text Height & Rotation Angle values in dialog text boxes.
Note: Text is measured in mm if the Length Unit is metric and in points if it is feet and inches.