Envelopes

Amplitude envelope Filter envelope Frequency envelope

There are actually four envelope types. The bandwidth one in SubSynth has identical controls to the frequency envelope.

divider freemode window

Freemode

This window shows a freemode enabled envelope. This is where all the normal controls have been assigned to fully editable points. Not only that, but you can add points up to a maximum of 40. This allows you to develop extremely detailed and expressive envelopes.
The yellow vertical is the sustain/release point, and you can have new points both sides of it.