VNC User Guide - RealVNC

Chapter 3: Using VNC Viewer
Scaling the host computer’s desktop
You can scale the host computer’s desktop, which might make it easier to navigate and to use.
To scale the desktop to the size of the VNC Viewer window, choose Scale to window size.
To scale the desktop to a custom size, choose Custom scaling, and specify a width and height. Turn on
Preserve aspect ratio to automatically calculate a height for a given width, and vice versa. Note that the
VNC Viewer window inherits these dimensions and cannot be made bigger using the mouse (only smaller).
Changing the size of the VNC Viewer window
You can use the mouse to resize the VNC Viewer window in the expected way for the platform of the client
computer. The window’s Application buttons (Minimize, Maximize, and Close) also work in the expected
way.
To toggle full screen mode on and off, click the Full Screen Mode
displayed in this mode; bump the mouse against an edge to scroll.
toolbar button. Note scroll bars are not
Trading performance for picture quality
You may be able to enhance the performance of the connection by reducing the number of colors used to
display the host computer’s desktop. To do this, turn off Adapt to network speed, and move the slider
towards Best compression.
Conversely, you may be able to improve the picture quality by increasing the number of colors. To do this,
move the slider towards Best quality. Note that sending more pixel information across the network may
have an adverse effect on performance.
Configuring your mouse
Note: The information in this section applies to VNC Viewer for Windows and Mac OS X only.
You can emulate buttons missing because your mouse has fewer buttons than the host computer’s mouse.
For example, if your mouse only has two buttons, turn on Enable 3-button mouse emulation. To emulate
the missing middle button, click the left and right mouse buttons simultaneously. Under Mac OS X, if your
mouse only has one button, you can also, or alternatively, turn on Enable 2-button mouse emulation. To
emulate the missing right button, hold down the CTRL key and press the button.
Note these options are on the Inputs tab.
Configuring your keyboard
Note: The information in this section applies to VNC Viewer for Windows only.
By default, and with the exception of CTRL-ALT-DELETE and the function key used to open the shortcut
menu, key presses affect the host computer and not the client. To reverse this behavior for the applicationlevel
keys listed below, turn off Pass special keys directly to VNC Server. Note this option is on the Inputs
tab.
Affected keys/combinations: WINDOWS (also known as START), PRINT SCREEN, ALT-TAB, ALT-ESCAPE,
CTRL-ESCAPE.
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