To access your platform's custom User Properties, click on the cog icon in the upper-right, then on User Properties.

Click on Add a New Label.

Select the most accurate label type, or if none of them are suitable, select Custom Label at the bottom of the list.

Next, you can rename the field using the Custom Label field to change how it appears in your platform and reports.

You can also change the Field Input Type to match the information. For example, you can have a field that only accepts dates for a hire date field, or show a list of States when a user's branch location is set. Once you're done, just hit Save.

The list will let you toggle which properties are active, as well as which are mandatory to fill in and which are visible to your learners.