Hi Tahl,
We're working on something which will show you an overview of the clustering process! You can of course use the command-line, but I agree that something a little bit more functional would be helpful in the GUI.
(for example, launch your session in interactive mode with phy cluster-manual -i myfile.kwik then type model.cluster_groups to list all the clusters and their group numbers - 0 = noise, 1 = MUA, 2 = good, 3 = unsorted)
You can plot more than 2 clusters by manually selecting the ones you want with the use of snippets: for example, to plot clusters 10 and 12, you can type
:c 10 12 [ENTER]
or for 10 through 20, you can do
:c 10-20 [ENTER].
Hope that helps! Thanks very much for your feedback - and that's a great figure :)
Max