The Display units field controls the unit system used to display most values.

Project Units: Display and calculate depth, length, area or volume using the units from the project coordinate system (see Creating a Project).

International Metres: Display units in metres. Calculate depth, length, area or volume using the units from the project coordinate system and convert them to metres for display.  

International Feet: Display units in international feet. Calculate depth, length, area or volume using the units from the project coordinate system and convert them to international feet for display.  

Network Settings: Configure the network connection settings used for error reporting and licensing (see Configuring Proxy Settings).

Crosshair: Change the appearance of the crosshair.

Volume Export Resources: Set the amount of resources allocated for exporting. This affects new exports and exports in progress. Running exports may take a few minutes to change to the new setting.

Mouse drag sensitivity while picking: The distance required before a mouse click is registered as dragging. The sensitivity decreases as you move the slider from Fine, Coarse to Off.

Reset hidden dialogs: Reset information dialogs that have been dismissed; e.g. instructions for the screen capture tool.

Close: Exit the Preferences window.