Rahul M K


Could you give more info on what background are you talking about?

If by background, you mean changing the appearance of background, then you can do so by using Graphics Background Colour/Style using File > Preferences > Appearance. 

Learn more about this in Fluent User Guide :  3.3. Setting User Preferences/Options (ansys.com)

If you are unable to access the link, follow this Forum discussion https://forum.ansys.com/forums/topic/using-help-with-links/#latest


Hope this helps!


Thank you!