There is the option to add a text overlay on the machine that is running Gateway.

Enable Overlay Turn on / off the text overlay
Moveable Allows the text overlay to be moveable with the mouse
Overlay Text The text to be displayed as the overlay
Position Define the location of top left corner of the text overlay in pixels
Size The size in pixels of the text overlay
Background Color Define the background color of the overlay
Text Color Define the color of the text