Assignee lists docs

doc/user/project/issue_board.md

@@ -40,9 +40,6 @@ organized from a broader perspective with one Issue Board per project,
 but also allow your team members to organize their own workflow by creating
 multiple Issue Boards within the same project.
 
-[GitLab Premium] adds even more powerful ways to work with Issue Boards by
-allowing you to have assignee lists as well as label lists.
-
 ## Use cases
 
 You can see below a few different use cases for GitLab's Issue Boards.
@@ -345,6 +342,29 @@ navigation level. A group-level issue board allows you to view all issues from a
 boards. When updating milestones and labels for an issue through the sidebar update mechanism, again only
 group-level objects are available.
 
+## Assignee Lists **[PREMIUM]**
+
+> Introduced in GitLab 11.0 Premium
+
+An assignee list shows all issues for the given assignee. You add an assignee list using the same button as adding
+a label list. There's an additional tab to select assignee list, where you specify a user to be the assignee. You remove an assignee
+list the same way as a label list, by clicking the Trash icon.
+
+You can have a board with both label lists and assignee lists.
+
+![Assignee lists](img/assignee_lists.png)
+
+## Dragging Issues Between Lists
+
+When dragging issues between lists, different behavior occurs depending on the source list and the target list.
+
+| | To Backlog | To Closed | To label `B` list | To assignee `Bob` list |
+| --- | --- | --- | --- | ---  |
+| From Backlog | - | Issue closed | `B` added | `Bob` assigned |
+| From Closed | Issue reopened | - | Issue reopened<br/>`B` added | Issue reopened<br/>`Bob` assigned |
+| From label `A` list | `A` removed | Issue closed | `A` removed<br/>`B` added | `Bob` assigned |
+| From assignee `Alice` list | `Alice` unassigned | Issue closed | `B` added | `Alice` unassigned<br/>`Bob` assigned |
+
 ## Features per tier
 
 Different issue board features are available in different [GitLab tiers](https://about.gitlab.com/pricing/), as shown in the following table: