Solutions for holding oscilloscope probes (and freeing up hands)

Without biological modification

Haha.

Does your oscilloscope come with probe hooks ?

If so, the next pcb you make, you can create some wire loops on the PCB.

Alternatively, you can build a DIY probe holder such as this (Make it open source so people with 3D printers can replicate your ultra helpful probe holders)

This probe holder is another cool idea for you to try.

In modern electronics and multi-point probing you do not hold probes. There are three options:

(1) If the signal is low-bandwidth (<100MHz), you solder a piece of flexible (multi-stranded) wire to points of interest, 0.5 - 1" long, and then connect (passive) probes that usually have hooks/clips.

(2) If signals are high bandwidth (500MHz - 8 whatever -12 GHz), you use attachments like this ZIF tip, and solder tiny (AWG 38-40) wires to test points;

(3) Alternatively you can use probe holders/positioners, with probe tips of pogo-pin style. But they are really not cheap.

After seeing comment from @Passerby about using clothepins, I thought I'd give it a try using common wooden laundry line clothepins. One isn't enough, but two seem to give a stable configuration: