Is it possible to select only the handles in some way?

There is a sentence in “3.3.1 Selecting Nodes and Paths” of Glyphs Handbook as follows. "Hold
down the option key to ignore the handles and only select on-curve nodes. "
I need the reverse operation, not the one described here.

Is it possible to ignore the on-curve nodes and only select handles?

You can invert the selection by shift dragging. So first select only the oncurve nodes and then shift drag-select the same area.

Simple and cool solution!
I worked this way for several days. It is very comfortable. Thank you!