Purpose

Use the Settings menu to open Operating Conditions or choose the interface appearance. The image below shows the Appearance submenu with Modern selected.

Steps

1. Open Settings in the top menu.

   

2. Choose Settings → Operating Conditions, or press Ctrl+R, to edit reference pressure and, when heat transfer is enabled, buoyancy settings. Click Apply in that dialog.
3. Open Settings → Appearance and choose Classic or Modern to change the interface appearance. A dot marks the active choice. CFxD remembers your choice between sessions; Modern is used when no preference has been saved.

Inputs and units

Input or value	Meaning	Units
Operating Conditions (Ctrl+R)	Opens the dialog for reference pressure and, with heat transfer enabled, buoyancy reference temperature and gravity. See Operating conditions for details.	Pa, K, m/s²
Appearance → Classic / Modern	Selects the interface appearance. The dot indicates the active choice.	No physical units

Limitations

• Buoyancy is available only with heat transfer enabled. Appearance changes affect presentation; physics is configured through the setup controls.

Related topics

• Operating conditions
• Units
• User interface