Posted by ravas on Apr 10, 2017; 1:48am
URL: https://forum.librecad.org/I-want-change-to-the-normal-appareance-of-My-LibreCAD-but-I-cann-t-tp5714786p5714787.html

Try the different styles in Options -> Widget Options

For further customization you can learn about Style Sheets.
http://wiki.librecad.org/index.php/User_Interface

For the background color in the drawing area it is:
Application Preferences -> Graphic Colors -> Background