What are CTRL-click colors in PgcEdit?

[FredThompson]

I was trying to select a group of items with the intention of right-clicking and choosing to kill the PGC playback.

That's not supported, right?

However, when I did this, I noticed CTRL-clicking on an item will cycle the color fo the text from black to red to blue to purple and back to black.

The only time CTRL is mentioned in the documentation is for CTRL-right-click.

What are the CTRL-click colors and how are they useful?

[jeanl]

They indicate a breakpoint in the Trace function (much like a breakpoint in a program). There are various types of breakpoints (check out the Trace panel) hence the various colors.
jeanl
PS: and no, multiple selection isn't supported as far as I know.