Most test elements can be saved to file in XML format. To so, right-click on the
element you wish to save, and select "save". Choose a file, and you're done. The
element you selected, plus all it's child elements will be saved.
To load from file, right-click on the tree element where you wish to the saved
item to be placed, and choose "open". Select the file where your test elements are
stored, and you're done.
Currently, all items are saveable (including the TestPlan itself), except for
Timers and Visualizers.