You can see screenshots of TOPCAT in action in the following places:
- SUN/253's windows appendix details all of TOPCAT's windows with illustrations
- [somewhat outdated] The TOPCAT gallery is a page containing lots of window screenshots
- [somewhat outdated] The TOPCAT V4 graphics page showcases some features of the new-style plotting windows introduced in version 4 (March 2013)
- [very outdated] The TOPCAT V3 screenshots page showcases some of the features introduced at version 3 (August 2007)
- There's a montage of some of the windows TOPCAT provides below; click on it for a full size version