The GNOME panel gEyes is an applet which adorns your panel with a pair of eyes which follow your mouse pointer around the screen. It is part of the gnome-applets package. This section of the guide refers to gEyes-1.1.2, which is distributed in gnome-applets-1.1.2.
To add the gEyes to your panel, you can press mouse button 2 on an empty part of the panel and follow the sequence Applets->Amusements->gEyes or you can issue this command at a command prompt: geyes_applet --activate-goad-server=geyes_applet &
The gEyes applet was written by Dave Camp (<campd@oit.edu>), and based on the well-known xeyes program.
Please report bugs in the gEyes applet to the GNOME bug tracking system. You can do this by following the guidelines on that site or by using bug-buddy from the command-line. For the package, put gnome-applets.
Once it is present, you don't need to do anything to gEyes. If you want to, though, the following options are available:
Pressing mouse button 1 has no effect.
Holding down mouse button 2 allows you to move the eyes about in the same way you move anything on the panel.
Pressing mouse button 3 brings up the standard choices available for applets, including a properties menu explained below, and an About box.
The properties dialogue box (which calls itself "gEyes Settings" rather than properties) lets you select a theme for the eyes. The themes vary from the (relatively) sensible to the bizarre.
With the honourable exception of Default-tiny, most of the themes will be too large for some sizes of panels and force the panel to resized.