The Advanced Tab

X-session title

In this entry field, you can specify your title for an X-session (and its icon) instead of its default title.
Note: A full title is the X-session title followed by its virtual DisplayNumber.

Initial TCP port number

In this entry field, you can change the default (6000) initial port number for your X-session that XServer will use.

Max size of XSELECTION

This option is used to change the default (1MB) size for X-Selection that may be copied to/from the MS Windows' Clipboard (in Bytes).

Total multi-monitors width
Total multi-monitors height

With these two values, you can set the forced multi-monitors mode if XServer cannot detect the multi-monitors mode automatically.
WWW is the sum width and the HHH is the sum height of your "monitors".
In the Full Screen mode, XServer can only use the MAIN monitor.

Quick X-session termination

This option is used to prevent from displaying the confirmation message on closing X-sessions.

Check of XDesk manager

This option is used to provide the correct focus processing by the XDesk virtual desktop manager.

Enable MS Windows Context Menu

This option is used to enable the standard MS Windows Context Menu (when right-clicks on the window's title bar provide the standard drop-down menu).

Enable Backing Store

This option lets you enable XServer to process the Backing Store mode. See also Forced Backing Store on the Screen Tab.

If this check box is checked, the Backing Store mode will be used with all X clients. This allows X Window System displays to be saved off-screen so that X clients do not have to refresh a window display after it has been obscured by another window. Saving a copy of the information obscured when windows overlap each other reduces network traffic. Certain X-applications will request the Backing Store mode on windows that are complicated to draw. The option will cause XServer to use Backing Store on all windows that the X-application requests it.

If this check box is clear, the Backing Store mode will be turned off so XServer will not save copies of windows information, even if the X-application does request it.

Icon on system TaskBar

This option enables your system to keep the X-session icon (as well as icons of applications started from the XServer's Run menu) in the system taskbar (for the Multiple modes).

Not reset XServer at last X client closing

This option is used to prevent XServer from resetting after the last X client closes its session (for not removing those resources that have been created by X clients run).

Terminate XServer at last X client closing

This option is used to automatically terminate XServer after the last X client closes its session.

Silent Bell

When enabled, this check box will block all sounds from all X applications of the package (XServer, X Clients, etc ...) (i.e., internal sounds and the X-protocol XBell requests).

Auto Clipboard Copy&Paste

This check box controls the mode of connection between the MS Windows Clipboard and the current X Selection. When enabled, then changing of the MS Windows Clipboard contents will force the same change in the current X Selection. Also, changing of the contents of the current X Selection (from the active application window) will automatically cause copying it into the MS Windows Clipboard (so you are ready to paste).

Reduce heavy Graphic

If this check box is selected, then XServer will use some methods to speed-up drawing (e.g., lossy drawing of images).

Default

This button sets up the default values for check boxes and edit fields in the box.

The Access Control Box

This box contains the following items that allow you to restrict access to your XServer from remote hosts. You can give access only to the hosts you authorized in the Authorize File and/or you specified in the Valid Hosts File.

Host Access Check

If this check box is checked, then XServer will check host access by using a file you specify in the Valid Hosts File field.

If this check box is disabled, then XServer will not check host access, so every host on your network will have access to your XServer (and the Authorization Check state does not matter).

Valid Hosts File

Use this field to specify a file you created to give access to hosts (and X clients) you wish to connect to your XServer.

This file will be used only if the Host Access Check check box is checked.

The file consists of text lines each of the following format:

IP_address comment
or
name comment

IP addresses are specified in the dotted IP address notation. Names must be specified as official host names or aliases in your hosts file.

Note that the host definition syntax allows you to use your hosts file as the Valid Hosts File.

Authorization Check

If this check box is checked, then XServer will make standard authorization check by using a file you specify in the Authorize File field.

If this check box is disabled, then XServer will not make standard authorization check.

Authorize File

Use this field to specify a file you created to give access to hosts you wish to connect to your XServer (for either XDM and non-XDM clients).

This file will be used only if the Authorization Check check box is checked.

Note: to use the Authorize File, you should copy the standard authorization binary file, ~HOME/.Xauthority, created with the 'xauth' utility on your host.

Auto-reject non-authorized X clients

If this check box is checked, then XServer will suppress the Authorization Audit message. This setting is useful if you want to reject any unauthorized X clients automatically (with no confirmation dialog).

Default

This button sets up the default values for check boxes and edit fields in the Access Control box.

Some Hints about Authorization and Host Access Policy

XServer checks permissions of hosts (and X clients) to establish connection by the following rules:

1. XServer will (firstly) make standard authorization check (if the Authorization Check check box is checked) and will (secondly) check host access (if the Host Access Check check box is checked).
   
   So if the Host Access Check check box is disabled, then every host on your network will have access to your XServer.
   
   
2. If the Authorization Check check box is enabled, and a host is found in the Authorize File, then XServer will give access to the host.
   
   
3. If the Host Access Check check box is enabled, and a host is found in the ValidAccessFile, then XServer will give access to the host.
   
   
4. If the Host Access Check check box is enabled, but the ValidAccessFile field is empty or the file you specified in the field cannot be normally read or the file is empty, and the Authorization Check check box is disabled, then access to your XServer is disabled for all hosts.
   
   
5. To authorize hosts that are absent in the ValidHostsFile, you can enable the Authorization Check check box and specify the Authorize File.