The field type enables you to assign one or more categories to a tracker item.
The categories that are displayed are the children of one category. This parent category must be identified by its category ID.

Once tracker item is categorized, it inherits Category Permissions if applicable as per Permission Enforcement Order

The Input Type option defines how the data for a tracker field is displayed and entered in forms. Different input types determine the interface element used for user interaction — for example, whether users choose from a dropdown list, tick checkboxes, or use a dual-list transfer box.

Selecting the appropriate input type improves usability depending on the nature of the field’s data (single vs. multiple values, number of options, etc.).

Available Input Types:

• Dropdown – Displays a single-selection dropdown list.
• Radio – Shows radio buttons for single selection.
• Checkboxes – Shows a list of checkboxes for multiple selections.
• Multiselect – Displays a multiple-selection list box.
• Transfer – Uses a dual-list interface (available ↔ selected) for multiple selections.

Removing a tracker's category field does not uncategorise the items. This should be done manually before removing the field or using category admin afterwards.

The div that contains the selec all button has a class .categSelectAll

The main field of the tracker item will be displayed in the categories browsing.