Some third-party plugins such as Kontakt give a bit of a fight some times to create automation. There are several ways, but the easiest and fastest is following these easy steps:
What if I would like to automate third-party plugin parameters? This will work for all native controls, not third-party plugins. On all faders, knobs, and dials you see in FL Studio you’ll be able to create automation by right-clicking the control you’d like to automate and selecting ‘Create Automation Clip’ FL Studio will give you the freedom to do anything you want with an automation lane: copying, cutting, pasting, create an LFO from it, transfer it's parameters into a different automation lane, among many other features. Just like with Patterns (MIDI Regions) and Samples (Audio Clips), Automation lanes can be placed anywhere in the Playlist (timeline), and can have any duration or shape that you wish. However, in FL Studio, things work a bit differently. In other daws such as Logic or ProTools, you'll see automation lanes attached to the track you want to automate.