Preferences window (Right Button)
The Preferences window is where you adjust the global settings for the program and all fractal windows. The Right Button page contains the settings to control how the right (secondary) mouse button works in the program.
To open the Preferences window's Right Button page: On the File menu, click Preferences, then click the Right Button tab.
The other tabs are for miscellaneous settings and the left button.
The default settings let you scroll, scale (zoom), rotate, set the julia seed, show the fractal calculation path, zoom-out by two, and zoom-out by four.