Unfortunately, in Logic Pro X Scroll Control cannot directly control automation. However, there is a very simple way to get around this. In this example, we are going to use a gain plugin. This would be useful for riding the level on a vocal take for example. However, the process is very similar for all other plug ins.
Step 1: Load the plug in on the relevant channel
First of all head to your insert section of the channel and load the plug in that you would like to automate. In this example, we want to automate the level of the channel. Therefore we will be using the Logic Gain plug in.
Step 2: Select The Parameter Within The Automation Window
After loading your gain plug in, all of the parameters will be available to select within the automation window. To access the automation window, simply press "A" on your keyboard. Then within the drop down window navigate to the gain plug in > Gain.
Step 3: Set Your Automation Mode
Next, you should set your automation mode. Choose either write, read, latch or touch. In this example, we have chosen write. This setting will depend on your workflow.
Step 4: Automate!
All that is left to do is record arm your track and write the automation. Simply open up the plug in, hover your mouse over the software knob for the chosen parameter, engage scroll control and hit record. Now as you adjust the knob using scroll control, it will write the information into the automation on the track.