Change the left control panel size

[lassoan (Andras Lasso)]

The module panel is sized automatically based on constraints defined by the widgets that are displayed in it. You can set a maximum width for the module panel (see below), but it will break the layout (widgets will “stick out” from it) if you reduce it beyond the feasible size.

mainWindow = slicer.util.mainWindow()
modulePanelDockWidget = mainWindow.findChildren('QDockWidget','PanelDockWidget')[0]
modulePanelDockWidget.setMaximumWidth(500)

If you want to make the module panel more compressible without breaking layouts, you can change the font size or screen scaling. See more information here:

4.11 Module panel is too wide and won't resize

You can scale the text/button sizes of Slicer many ways: Reduce font size in Slicer in menu: Edit / Application settings / Appearance / Font and size Reduce the font scaling by running set QT_SCALE_FACTOR=0.5 in the command console and then starting Slicer in that console (you can make this permanent by adding this to your environment variables or creating a .bat file that sets this and then starts Slicer) You can adjust text scaling settings on your computer Drag-and-drop the module panel to …