Type of Issue Bug - PySimpleGUI or matplotlib? Clicking "Plot" with Matplotlib >= 3.5.0 will make the plot window grow. With matplotlib==3.4.3, the plot window stays the same size. Not sure if it's a ...

So you need to redefine the toolitems in the class NavigationToolbar2QT (you can also see under, the pre-defined buttons available atm). In that case I wanted to remove 2 buttons ('Save' and 'Subplots ...