How can Power Supply behave as a current source? How to access the CC mode of operation?

How can I use my power supply to deliver a known amount of current?
It seems to be a voltage source only.

In contrast to our SourceMeter products which can directly be current source or voltage source, a power supply is always a voltage source.

But even for voltage source, there is also the parameter setting for the current compliance limit.
A power supply can achieve current source (CC mode) behavior by deliberately operating it in current limit.

Suppose you have a device that is approximately 10Ω and you want to source 100mA through it.
So you’d expect a 1V potential to develop.
Configure the power supply for the 100mA limit and ask it to source more than 1V…..let’s say 10V.
It will not be able to achieve the 10V because it will first encounter the 100mA limit.
The power supply read back functions will show the appx 1V of potential and the 100mA of current.