You can set up the countdown via the thin client's local Setup, or via the Universal Management Suite (UMS). It is recommended to use the UMS and store your settings in a profile; this allows you to apply your settings to a random number of thin clients in one go.
Go to User Interface > Screen Lock/Server > Screensaver.
Customize the countdown's appearance using the following parameters; these parameters define the appearance of both the screensaver's clock and the countdown. For further information, see the manual chapter Screensaver (for IGEL Linux v5) or Screensaver (for IGEL OS 10).
Image display mode: Position and scaling for the background image
This parameter is only relevant for IGEL Linux v5. With IGEL Linux version 10.03.500 or higher, the Image display mode is set to "Full-screen letterbox".
Clock display monitor: Selects the monitor(s) on which the countdown is to be shown.
Clock display size: Size of the countdown digits
Horizontal clock position: Horizontal position of the countdown digits
Vertical clock position: Vertical position of the countdown digits
Clock background color: Color of the countdown background area. The countdown background area is a rectangle with rounded corners.
Clock foreground color: Color of the countdown digits
Apply the settings to your thin clients or to your profile.
Here is an example of the countdown with a custom image: