Issue description
When you open your schedule scheme settings and click Add Fields not all fields are available to you.
Solution
In the Door settings, you'll find numerous options and fields where you can configure and input data. Most of these are not available when you select the Add Fields button as there not considered 'general'.
Next to the Add Fields button, there is a down arrow. Click the arrow and select Library Part Parameters.
To help you search for your library part more easily, select the option Folder View (used objects only).
This will limit the folders available to you. Select the object you have used and would like to schedule.
All the non-general parameters are now available to you. Select from the list and click Add to add it to your schedule, make sure to format the schedule for easy reading.
Tip: Check out the other types of schedules you can produce.