The project pane is used to define project parameters (distance and calibre) and manage attached target images.
When you switch to the project pane, three additional buttons appear on the toolbar:
Discards all data and starts a new project. The same can be done by simply reloading the browser window.
Saves the project to a file (XML format), including all parameters, targets, shots, analysis, etc. -- everything. You should save your project before you close your browser or reload the TARAN page, otherwise all data will be lost.
Loads a project from file.