One can run interactive demo scripts within the IMAGER program. At the IMAGER prompt just type the following command to get an up to date list.
IMAGER> @gag_demo:demo
Demo list as of 2021-12-03
basic
feather
line
mosaic
primary
selfcal
single
spectro
uvfit
Select one of them, then enter its name at MYDEMO = to get it running