Custom Fields: Better Clarity with Sections
You can now organize custom fields into named sections. Sections group related fields together under a clear heading in the side panel, making it easier to find and fill in the right fields.
In the Account Settings, you can create, rename, sort, and delete sections. Fields can be moved between sections and rearranged using drag and drop. Note: Administrator rights are required for this.

Help article: Custom Fields — Sections
Note: Custom fields are not available in the InLoox Professional Edition.