To create a command line to customize your server (such as specifying the module to load at startup) go to the control panel in the "command line changer":

Then create a new command line by clicking "New" in the bottom right, here is an example command line creation:

Note:
- The command line name must not contain any spaces or special characters, only numbers and / or letters.
- You are not forced to check all parameters

Once the command line has been created save it by clicking "Save" and return to the previous menu by clicking "Back".

You must then activate the command line by clicking on "Select".
The active command line is the one that is marked as "Selected" on the right as shown here: