Mouse, Ctrl + Shift + left mouse button pressed down

Options, desktop environment, mouse and crosshairs

Keeping the Ctrl key + the Shift key + the left mouse button pressed down starts the "Pan" function (for two-button mouse)

When you select this option, you can pan in the current viewport by pressing and holding down the Ctrl key + the Shift key + the left mouse button. This option helps you control the on-screen display in conjunction with a two-button mouse (for example, for Macintosh computers).