The F_GLIDEx2 has two full GLIDE modules so you can have 6 glide signals at once...
The glide module(also called portamento) is an absolute must for synthesizers to be able to make the PITCH signal from the main interface glide to the next pressed key. It smoothes out the voltage from one value to the next. The knob sets the value for any of the three glide sections that are available in the module. So connect your PITCH output to the input of any of the sections and take an output and connect to an EXT input of a VCO to make that VCO glide. You can also use the GLIDE module so smoothen LFO signals or SEQUENCER pitch or even gate signals.