Brown circles in gcode viewer -- what do they mean?

General
1

I don't understand the brown circles that appear in the GCode viewer running in Firefox on a Mac and Windows 11. I have never seen these for gcode I have sliced. They appear intermittently in files sliced by users in the makerspace I run.

Here is a link to a screen shot: https://photos.app.goo.gl/pSxkhPV3oea6UCeM7

I searched the forum and Google, but don't see any reference to these. All machines are running Octoprint 1.9.3

Thanks for any light you can shine on this.

2

I believe those are from the 'cancel objects' plugin. They're marking the different parts you can choose to cancel.

3

Thank you so much! That explains it perfectly. My mystery is solved and after some experimentation with cancel objects and slicing settings, a plate full of many pieces can be salvaged if one of them begins failure or otherwise shouldn't be printed.