remove individual parameters on ipc Hog 2

I figured it out once before, and I have sine forgotten. On a Hog 2 console to remove a specific individual parameter from the programmer, I would make the fixture active, hold down backspace, and move the appropriate encoder. This does not work on the IPC. I checked the manual, and I did not see the solution that I thought I had discovered once long ago.

This is what the manual says:

You can remove individual parameters from the selected fixtures in an editor:
• Hold Knockout and move the relevant parameter wheel, or press the
relevant button on the Slot Toolbar.
• Hold Backspace and move the relevant parameter wheel.
• Backspace + Colour : hold Backspace press the relevant parameter
type key; this gives single-handed operation.

I thought that there was a hard button other than backspace that could be held while touching an encoder for deselection.

Any thoughts?

nick
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