How to save a profile ?
The default background color is black. If we want the color to be white, we can modify the background color and save a profile.
Enter OP and press Enter key to open the “Options” dialog box. Switch to “Profiles” tab, and click “Add to List” button, in the popped up “Add Profile” dialog box, we can add profile name and description,
Then click “Apply & Close” and close the dialog box.
To make a saved profile current, just select the profile and click “Set Current” button, as shown in the following picture,
How to reset your CAD to defaults
Check the blog post