It allows the user to execute a script with keyword changes, or 'events', for an other task. Ggi will try to select the most suitable visual available, but the user can override this choice.
More information is provided in a separate document .
We are currently using the RedHat 7.0 distribution. It extracts data along a user defined line, ellipse or spline curve and shows the data as XV images. It shows z-profiles with intensities or flux in a predefined area. It has a graphical user interface, is easy to master and has lots of import and export utilities. Displayed images, annotated with coordinate labels, can be sent very easily to printer or PostScript file.