Dell KVM 1082DS - Manual (Page 85)

Using the Viewer xxx | xxx 85
Figure 4.13: Viewer Macro Menu Expanded - Linux Option
Session Options - General Tab
The General tab in the Session Options dialog box allows you to control the
Keyboard Passthrough option in non-full screen mode, the Menu Activation
Keystroke, and the Background Refresh selection.
The Keyboard Pass-through check box allows you to specify whether Keyboard
Pass-through mode is enabled, or not. The Keyboard Pass-through option is not
selected by default.