VNC^® Enterprise Edition User Guide

Contents

Working with VNC Viewer for Java

You can use VNC Viewer for Java to:

• Control the host computer using your keyboard and mouse.

• Copy and paste text between applications running on the client and host computers.

• Trade performance for picture quality while the connection is in progress.

• Restrict access to functionality while the connection is in progress.

See the sections below for more information on these issues. For a summary of functionality that is not available, see Connecting from a web browser.

Using the VNC Viewer for Java shortcut menu

VNC Viewer for Java has a shortcut menu to facilitate common operations.

Note: VNC Viewer for Java does not have a toolbar.

To open the shortcut menu, press the F8 key (you may need to hold down the FN key under Mac OS X):

(Windows XP)

The following table explains the effect of selecting these menu options.

Shortcut menu option	Explanation
Exit VNC Viewer	Closes VNC Viewer for Java.
Clipboard	Opens the VNC clipboard dialog. You can preview the contents of the Clipboard and, providing copy and paste is enabled, paste it to an application running either on the client or on the host computer. For more information, see Copying and pasting. Note that if you chose not to trust VNC Viewer for Java when you downloaded it, you can only copy and paste text between the two computers via this dialog.
Send F8	Sends an F8 command to the host computer. (F8 opens the shortcut menu.)
Send Ctrl-Alt-Del	Sends the CTRL-ALT-DELETE command to the host computer. (Pressing this key combination would be interpreted by the client computer.)
Refresh screen	Refreshes the display of the host computer’s desktop.
New connection	Opens the VNC Viewer: New Connection dialog. You can start a new connection to the same host computer, or to a different one, using the same web browser session. You do not need to download VNC Viewer for Java again. For more information, see Connecting to VNC Server.
Options	Opens the VNC Viewer: Connection Options dialog. You can configure most aspects of VNC Viewer for Java while the current connection is in progress. For more information, see Using the VNC Viewer for Java Connection Options dialog. Note that some properties must be configured before you connect. For more information, see Configuring VNC Viewer for Java before you connect.
Connection info	Opens a dialog displaying technical information about the current connection, such as the encryption method and compression format.
About VNC Viewer	Displays information about VNC Viewer for Java.
Dismiss menu	Closes the shortcut menu.

Using the VNC Viewer for Java Connection Options dialog

The VNC Viewer: Connection Options dialog enables you to configure VNC Viewer for Java while the current connection is in progress:

(Windows XP)

Note: Some VNC Viewer for Java properties must be configured before you connect. For more information, see Configuring VNC Viewer for Java before you connect.

To open the VNC Viewer: Connection Options dialog, select Options from the shortcut menu. For more information on this menu, see Using the VNC Viewer for Java shortcut menu.

The following sections explain the properties in this dialog.

Trading performance for picture quality

You may be able to enhance the performance of VNC Viewer for Java by reducing the number of colors used to display the host computer’s desktop. To do this, turn off Auto Select and choose either 256, 64, or 8 colors. These properties are on the Encoding tab.

You can also choose an alternative to the default ZRLE encoding. The Hextile and Raw encodings require increasingly less processing power to display the host computer’s desktop, though note they also require progressively more bandwidth.

Restricting access to functionality

You can quickly prevent all interchange with the host computer, making VNC Viewer for Java ‘view only’. To do this, turn on View only (ignore mouse & keyboard). This property is on the Inputs tab.

You can disable copy and paste, or just copy and paste in a particular direction. For more information, see Copying and pasting.

Troubleshooting display

If the mouse cursor is not behaving in the expected way, turn off Render cursor locally. This property is on the Misc tab.

If the screen is not updating properly, turn off Fast CopyRect. This property is on the Misc tab.

Copying and pasting

You can copy and paste text between applications running on the client and host computers. This feature works in the same way as it does for VNC Viewer. Follow the instructions in Copying and pasting text between client and host computers.

You can preview the contents of the Clipboard to see what text is available to paste. To do this, open the shortcut menu and select Clipboard. For more information on this menu, see Using the VNC Viewer for Java shortcut menu. The VNC clipboard dialog opens:

(Windows XP)

Disabling and enabling copy and paste

You can disable copy and paste while the current connection is in progress. To do this, open the VNC Viewer: Connection Options dialog. For more information on this dialog, see Using the VNC Viewer for Java Connection Options dialog. On the Inputs tab, turn off Accept clipboard from VNC Server and Send clipboard to VNC Server.

Note you can turn these properties off separately in order to disable copy and paste in one direction only.

VNC® Enterprise Edition User Guide

VNC^® Enterprise Edition User Guide