Cubit uses Qt Style Sheets to customize the Cubit GUI, including making changes to colors, buttons, and panels. Qt Style Sheets are similar to HTML cascading style sheets, but are adapted for use with Qt widgets. The Cubit style sheet is named stylesheet.qssand is located in the Cubit /bin folder (for example, C:\Program Files\Cubit 15.0.1 (x64)\bin). This style sheet can be modified or replaced with a custom style sheet to change the attributes of the Cubit GUI. For information about Qt style sheets, please visit the Qt Reference Documentation on the Qt https://doc.qt.io/Qt-5/stylesheet-syntax.html.