DVT SystemVerilog IDE User Guide
Rev. 19.1.17, 17 May 2019

42.24 How do I change the background color of the Editor?

Go to Window > Preferences, then navigate to General > Editors > Text Editors. In the panel on the right, from the Appearance color options list select Background color, then use the color picker to choose the desired color (the System default checkbox must be unchecked).