Yes, the window is resizable. Drag any edge or corner to adjust the size. Your preferred size is automatically saved to settings.yaml and restored on next launch.
The default size is 1000 × 600 pixels.
Go to View > Hide Elements > Menu (press Alt to show). The menu bar will be hidden, but you can temporarily show it by pressing the Alt key.
The View > Hide Elements submenu allows you to hide:
Note: In Drag & Drop mode, “Empty Buttons” is forced visible for editing. All other hide settings follow user preferences.
Yes, all hide element settings are saved to settings.yaml and persist across sessions.