After opening a study in viewer on a computer, default mouse button functions are shown on top right of viewing space - unless previously changed by user.

We recommend using an actual mouse on a computer.

One may also explicitly select a function from the toolbar as shown below. This will lock the mouse to selected function until it is changed or user logs out and in again. This might be useful to users without an actual mouse.

Default mouse function settings may be changed in viewer user settings (see below). Changes made in this manner are persistent across logins for the user account.

To rotate a 3D (VR) image, keep both right and left buttons pressed and move the mouse.