**As** an OpenProject administrator
**I want to** enable or disable a custom field for multiple project at once
**so that** I save time on that.

**Acceptance criteria**

* **Tab navigation**

* In _Administration_ -> _Custom Fields_ -> _Custom Fields A_ we introduce a tab navigation (similar to project attributes)

* `Details`

* Begin of the insertion`Projects`End of the insertion Begin of the deletion `Enabled in projects`End of the deletion

* Begin of the insertion**Project list**End of the insertion Begin of the deletion **"Add to Project" modal**End of the deletion

* Begin of the insertionShow project list of all projects in which this custom field is activated

* End of the insertion The Begin of the insertionlist should displayEnd of the insertion Begin of the deletion button "Add to project" doesEnd of the deletion the Begin of the insertionproject hierarchy

End of the insertion Begin of the deletion same like in Project Attributes

End of the deletion * Begin of the insertionThe list should be paginated

* The list should be searchable

* Projects should be removable from list with the help ofEnd of the insertion Begin of the deletion **RemovingEnd of the deletion a Begin of the insertionmenu on the row.

End of the insertion Begin of the deletion project**

End of the deletion * Begin of the insertionIf an error occurs during the delete actionEnd of the insertion Begin of the deletion DisablingEnd of the deletion a Begin of the insertionerror banner should be displayed on top of the page.

* There is no confirmation needed for disabling aEnd of the insertion custom field Begin of the insertiononEnd of the insertion Begin of the deletion inEnd of the deletion a project Begin of the insertion

* It should not be possibleEnd of the insertion Begin of the deletion is similarEnd of the deletion to Begin of the insertionadd/remove projects when theEnd of the insertion Begin of the deletion removing aEnd of the deletion project attribute Begin of the insertionis required. A info banner should be shown instead

* If there is no project or the last project was removedEnd of the insertion from Begin of the insertionthe listEnd of the insertion a Begin of the insertion"no results"-messageEnd of the insertion Begin of the deletion project (thereEnd of the deletion is Begin of the insertionshown

* **Add projects dialog** 

* A dialog opens when the "Add projects"- button is clicked

* The dialog shows a projects selector in autocompleter-style with search functionality

* User should be able to select multi projects

* Selected projects are shown as pills in the input

* Already added projects should be deactivated but visible and searchable in the dropdown

* The dialog shows the option to "include sub-projects"

* When this checkbox is checked it will additionally add all sub-projects of the selected projects (including sub-sub-projects etc.


End of the insertion Begin of the deletion no warning)


End of the deletion **Out of scope**

* Bulk actions


**Figma and visuals**

https://www.figma.com/design/6RzNWrc8jpqhE7jpaCXsGB/Multi-project-selector?node-id=1122-60067