All issue fields are custom fields. By default, YouTrack includes commonly-used issue fields, like Type, State, and Assignee. For a list of custom fields that are attached to projects by default, see Default Custom Fields.
In addition to the fields that are predefined, you can define your own custom fields. You can use custom fields to store values for scheduling, references, hardware specifications or whatever else you need to track issues efficiently.
For information about supported issue field types, see Custom Field Types. Custom field types can be divided in two categories:
The process for creating new issue fields varies by type. All issue fields have the following common properties:
|Private Access||When you set the Private property for a field, it can only be viewed and edited by users who have the permissions to Read Issue Private Fields and Update Issue Private Fields respectively.|
|Visible by default||When you set this property for a field, it is displayed in the Issues list by default. Individual users can configure their personal visibility parameters to hide the field in the list.|
|Auto-attached||If enabled, the custom field is attached automatically to new projects that are created with the Default project template. Projects that are created with the Kanban or Scrum template ignore this setting. For more information, see Attach Custom Fields to Projects.|
Each custom field can be used in multiple projects.