Out of their manual:
"Multi-link - To link multiple controls in one session, use the Multi-link option on the recording panel. Select the switch, tweak all the target controls, then tweak the same number of knobs on your hardware controller and turn off the switch (most people can remember about 7 links, how good is your memory?). "
“Select this switch to start the multi-link process. Tweak some software controlls, tweak the same number of hardware knobs and they will link in the same order the software controls were tweaked. Turn off the ‘Multi-link controllers’ switch when you are done. Controller movements can then be recorded if desired”
It is that simple, you’ll have multiple knobs and/or faders on a dsp/vst(i) linked with your external midi controller within seconds.
I think this is great functionality that speeds up the mapping considerably. You wouldn’t have to add an automation editor and browse to the desired parameter(s) to map anymore…just tweak a knob on a vst(i) succeeded by a controller knob & volilá. Under the hood, n00b efficient (maybe in the case of renoise it would automatically add an automation device + selection of tweaked knobs in right order).
) from how Fl Studio handles things, from the browser to their pattern arranger (playlist) to simple things like grouping in the stepsequencer for the sake of better oversight in a pattern.