Here are showed some FitPlot snapshots.
Clicking on each preview image will open a new window with the full resolution [1280x800px] screenshot, it may take some seconds to load. The first one is a FitPlot main window with many indications that help to understand the working environment of the app.

The following images are in-action snapshots showing the main window with the various utility panels that are useful in many task FitPlot is able to perform.
Each screenshot has some notes to indicate the above mentioned panels.
Refers to Usage and Commands section for a more detailed discussion on the subject.