Customise Field Settings
From Charitylog Manual
The Customisable Tab Settings page allows you to control which fields appear in the Organisation/People "Details" pages.
For example, the Client Details screen has various fields on the "General Details" tab, and various fields on the "Personal Details" tab. The Customisable Tab Settings page lets you control whether fields appear at all, and which of these two tabs each field appears on.
Clicking on the Customisable Tab Settings menu item (Administration > Security > Customisable Tab Settings)