Qt 5.11 | Qt Designer Manual | Using Stylesheets with Qt Designer

Qt 5.11.3 Reference Documentation

Editing Resources with Qt Designer ◦ Using a Designer UI File in Your Application

# Using Stylesheets with Qt Designer

Since Qt 4.2, it is possible to edit stylesheets in Qt Designer with the stylesheet editor.

Setting a Stylesheet The stylesheet editor can be accessed by right-clicking a widget and selecting Change styleSheet...