Categories in EssentialPIM Pro are an easy way to sort or mark your entries.

Using categories with Appointments and To Dos.

You can set category for Appointments or To Dos in special drop down menu in Appointment info or To Do info dialog

For more flexibility Categories list is customizable.

By pressing "..."  button you get to Categories dialog where you can add, delete or edit categories.

The order which categories are listed in this dialog is used while sorting To Dos or Appointments by category in table view. To change categories order you can use Move Up and Move Down buttons.

The color near category name is used to colorize the Appointments in Calendar or to mark To Do's. To change category color press Color… button and choose preferred one.