Most plugins send their output to the Output Window, and you can also add text and graphics to the output window from custom R scripts. We are aware, this window needs a lot of improvements, but it already allows you to create a simply documentation of your anaylses, easily.
The Run again
-link allows you to quickly invoke the plugin again, with the same settings. This allows you to redo an analysis with new data or slightly changed options in an easy and straightforward way.