Update label documentation

Update label documentation with newer screenshots, cut long
lines, and touch up the text, especially the delete label
section. Also adds new screenshots for clarity

doc/user/project/labels.md

@@ -2,43 +2,52 @@
 
 ## Overview
 
-Labels allow you to categorize issues or merge requests using descriptive titles like `bug`, `feature request`, or `docs`. Each label also has a customizable color. They allow you to quickly and dynamically filter and manage issues or merge requests you care about, and are visible throughout GitLab in most places where issues and merge requests are located.
+Labels allow you to categorize issues or merge requests using descriptive titles like
+`bug`, `feature request`, or `docs`. Each label also has a customizable color. They
+allow you to quickly and dynamically filter and manage issues or merge requests you
+care about, and are visible throughout GitLab in most places where issues and merge
+requests are located.
 
 ## Project labels and group labels
 
 In GitLab, you can create project and group labels:
 
 - **Project labels** can be assigned to issues or merge requests in that project only.
-- **Group labels** can be assigned to any issue or merge request of any project in that group or any subgroups of the group.
+- **Group labels** can be assigned to any issue or merge request in any project in
+  that group, or any subgroups of the group.
 
 ## Scoped labels **(PREMIUM)**
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/issues/9175) in [GitLab Premium](https://about.gitlab.com/pricing/) 11.10.
 
-Scoped labels allow teams to use the simple and familiar feature of labels to
+Scoped labels allow teams to use the simple and familiar label feature to
 annotate their issues, merge requests, and epics to achieve custom fields and
 custom workflow states by leveraging a special label title syntax.
 
-A scoped label is a kind of label defined only by a special double-colon syntax
+A scoped label is a kind of label defined by a special double-colon syntax
 in the label’s title, using the format `key::value`. For example:
 
-![A sample scoped label](img/key_value_labels.png)
+![A sample scoped label](img/labels_key_value_v12_1.png)
 
 An issue, epic, or merge request cannot have two scoped labels with the same key.
-For example, if an issue is already labeled `priority::3` and you apply the label `priority::2` to it,
-`priority::3` is automatically removed.
+For example, if an issue is already labeled `priority::3`, and then you apply the
+`priority::2` label to it, `priority::3` is automatically removed.
 
 This functionality is demonstrated in a video titled [Use scoped labels in GitLab 11.10 for custom fields and custom workflows](https://www.youtube.com/watch?v=4BCBby6du3c).
 
 ### Labels with multiple colon pairs
 
-If labels have multiple instances of `::`, the longest path from left to right, until the last `::`, is considered the "key" or the "scope".
+If labels have multiple instances of `::`, the longest path from left to right, until
+the last `::`, is considered the "key" or the "scope".
 
-For example, `nested::key1::value1` and `nested::key1::value2` cannot both exist on the same issue. Adding the latter label will automatically remove the former due to the shared scope of `nested::key1`.
+For example, `nested::key1::value1` and `nested::key1::value2` cannot both exist on
+the same issue. Adding the latter label will automatically remove the former due to
+the shared scope of `nested::key1`.
 
-`nested::key1::value1` and `nested::key2::value1` can both exist on the same issue, as these are considered to use two different label scopes, `nested::key1` and `nested::key2`.
+`nested::key1::value1` and `nested::key2::value1` can both exist on the same issue,
+as these are considered to use two different label scopes, `nested::key1` and `nested::key2`.
 
-### Workflows with scoped labels **(PREMIUM)**
+### Workflows with scoped labels
 
 Suppose you wanted a custom field in issues to track the platform operating system
 that your features target, where each issue should only target one platform. You
@@ -58,101 +67,154 @@ be able to advance workflow states consistently in issues themselves.
 
 ## Creating labels
 
->**Note:**
+NOTE: **Note:**
 A permission level of Reporter or higher is required to create labels.
 
 ### New project label
 
 To create a **project label**, navigate to **Issues > Labels** in the project.
-This page only shows project labels in this project and group labels of this project's parent group.
+This page only shows the project labels in this project, and the group labels of the
+project's parent group.
 
-Click the **New label** button. Enter the title, an optional description, and the background color. Click **Create label** to create the label.
+Click the **New label** button. Enter the title, an optional description, and the
+background color. Click **Create label** to create the label.
 
-If a project has no labels, you can generate a default set of project labels from its empty label list page:
+If a project has no labels, you can generate a default set of project labels from
+its empty label list page:
 
-![Labels generate default](img/labels_generate_default.png)
+![Labels generate default](img/labels_generate_default_v12_1.png)
 
 GitLab will add the following default labels to the project:
 
-![Labels default](img/labels_default.png)
+![Labels default](img/labels_default_v12_1.png)
 
 ### New group label
 
-To create a **group label**, follow similar steps from above to project labels. Navigate to **Issues > Labels** in the group and create it from there.
-This page only shows group labels in this group.
-Alternatively, you can create group labels also from Epic sidebar. Please note that the created label will belong to the immediate group to which epic belongs.
+To create a **group label**, navigate to **Issues > Labels** in the **group** and create
+it from there. This page only shows group labels in this group.
+
+Alternatively, you can create group labels from the Epic sidebar. Please note that the
+created label will belong to the immediate group to which the epic belongs. **(ULTIMATE)**
 
-![Create Labels from Epic](img/labels_epic_sidebar.png)
+![Create Labels from Epic](img/labels_epic_sidebar_v12_1.png)
 
 Group labels appear in every label list page of the group's child projects.
 
-![Labels list](img/labels_list.png)
+![Labels list](img/labels_list_v12_1.png)
 
 ### New project label from sidebar
 
-From the sidebar of an issue or a merge request, you can create a new **project label** inline immediately, instead of navigating to the project label list page.
+From the sidebar of an issue or a merge request, you can create a new **project label**
+inline immediately, instead of navigating to the project label list page.
 
-![Labels inline](img/new_label_from_sidebar.gif)
+![Labels inline](img/labels_new_label_from_sidebar.gif)
 
 ## Editing labels
 
 NOTE: **Note:**
 A permission level of Reporter or higher is required to edit labels.
 
-You can update a label by navigating to **Issues > Labels** in the project or group and clicking the pencil icon.
+To update a label, navigate to **Issues > Labels** in the project or group
+and click the pencil icon. The title, description and color can be changed.
 
-You can delete a label by clicking the trash icon.
+To delete a label, click the three dots next to the `Subscribe` button, and select
+**Delete**.
+
+![Delete label](img/labels_delete_v12_1.png)
 
 ### Promoting project labels to group labels
 
-If you are expanding from a few projects to a larger number of projects within the same group, you may want to share the same label among multiple projects in the same group. If you previously created a project label and now want to make it available for other projects, you can promote it to a group label.
+If you are expanding from a few projects to a larger number of projects within the
+same group, you may want to share the same label among multiple projects in the same
+group. If you previously created a project label and now want to make it available
+for other projects, you can promote it to a group label.
 
-From the project label list page, you can promote a project label to a group label. This will merge all project labels across all projects in this group with the same name into a single group label. All issues and merge requests that previously were assigned one of these project labels will now be assigned the new group label. This action cannot be reversed and the changes are permanent.
+From the project label list page, you can promote a project label to a group label.
+This will merge all project labels with the same name into a single group label, across
+all projects in this group. All issues and merge requests that were previously
+assigned one of these project labels will now be assigned the new group label. This
+action cannot be reversed and the changes are permanent.
 
-![Labels promotion](img/labels_promotion.png)
+![Labels promotion](img/labels_promotion_v12_1.png)
 
 ## Assigning labels from the sidebar
 
-Every issue and merge request can be assigned any number of labels. The labels are visible on every issue and merge request page, in the sidebar. They are also visible in the issue board. From the sidebar, you can assign or unassign a label to the object (i.e. label or unlabel it). You can also perform this as a [quick action](quick_actions.md) in a comment.
+Every issue and merge request can be assigned any number of labels. The labels are
+visible on every issue and merge request page, in the sidebar. They are also visible on:
+
+- Every issue and merge request page in the sidebar.
+- The issue board.
+
+From the sidebar, you can assign or unassign a label to the object (i.e. label or
+unlabel it). You can also perform this as a [quick action](quick_actions.md),
+in a comment.
 
 | View labels in sidebar | Assign labels from sidebar |
-|:---:|:---:|
+|:----------------------:|:--------------------------:|
 | ![Labels sidebar](img/labels_sidebar.png) | ![Labels sidebar assign](img/labels_sidebar_assign.png) |
 
 ## Searching for project labels
 
-You can search for project labels by navigating from the left sidebar to your
-project's **Issues > Labels** and entering your query to the search bar on the
-top-right:
+To search for project labels, go to **Issues > Labels** in the left sidebar, and enter
+your search query in the **Filter** field.
 
 ![Labels project list search](img/labels_project_list_search.png)
 
-GitLab will consider the label title and description for the search.
+GitLab will check both the label titles and descriptions for the search.
+
+## Filtering by label
+
+The following can be filtered labels:
 
-## Filtering issues, merge requests and epics by label
+- Issue lists
+- Merge Request lists
+- Epic lists **(ULTIMATE)**
+- Issue Boards
 
 ### Filtering in list pages
 
-From the project issue list page and the project merge request list page, you can [filter](../search/index.md#issues-and-merge-requests) by both group (including subgroup ancestors) labels and project labels.
+- From the project issue list page and the project merge request list page, you can
+  [filter](../search/index.md#issues-and-merge-requests) by:
+  - Group labels (including subgroup ancestors)
+  - Project labels
 
-From the group issue list page and the group merge request list page, you can [filter](../search/index.md#issues-and-merge-requests) by both group labels (including subgroup ancestors and subgroup descendants) and project labels.
+- From the group issue list page and the group merge request list page, you can
+  [filter](../search/index.md#issues-and-merge-requests) by:
+  - Group labels (including subgroup ancestors and subgroup descendants)
+  - Project labels
 
-From the group epic list page, you can [filter](../search/index.md#issues-and-merge-requests) by both current group labels as well as descendant group labels.
+- You can [filter](../search/index.md#issues-and-merge-requests) the group epic list
+  page by: **(ULTIMATE)**
+  - Current group labels
+  - Descendant group labels
 
-![Labels group issues](img/labels_group_issues.png)
+![Labels group issues](img/labels_group_issues_v12_1.png)
 
 ### Filtering in issue boards
 
-- From [project boards](issue_board.md), you can filter by both group labels and project labels in the [search and filter bar](../search/index.md#issue-boards).
-- From [group issue boards](issue_board.md#group-issue-boards-premium), you can filter by only group labels in the [search and filter bar](../search/index.md#issue-boards). **(PREMIUM)**
-- From [project boards](issue_board.md), you can filter by both group labels and project labels in the [issue board configuration](issue_board.md#configurable-issue-boards-starter). **(STARTER)**
-- From [group issue boards](issue_board.md#group-issue-boards-premium), you can filter by only group labels in the [issue board configuration](issue_board.md#configurable-issue-boards-starter). **(STARTER)**
+- From [project boards](issue_board.md), you can use the [search and filter bar](../search/index.md#issue-boards)
+  to filter by:
+  - Group labels
+  - Project labels
+
+- From [group issue boards](issue_board.md#group-issue-boards-premium), you can use the
+  [search and filter bar](../search/index.md#issue-boards) to filter by group labels only. **(PREMIUM)**
+
+- From [project boards](issue_board.md), in the [issue board configuration](issue_board.md#configurable-issue-boards-starter),
+  you can filter by: **(STARTER)**
+  - Group labels
+  - Project labels
+
+- From [group issue boards](issue_board.md#group-issue-boards-premium), in the [issue board configuration](issue_board.md#configurable-issue-boards-starter),
+  you can filter by group labels only. **(STARTER)**
 
 ## Subscribing to labels
 
-From the project label list page and the group label list page, you can subscribe to [notifications](../../workflow/notifications.md) of a given label, to alert you that the label has been assigned to an issue or merge request.
+From the project label list page and the group label list page, you can subscribe
+to [notifications](../../workflow/notifications.md) of a given label, to alert you
+that the label has been assigned to an issue or merge request.
 
-![Labels subscriptions](img/labels_subscriptions.png)
+![Labels subscriptions](img/labels_subscriptions_v12_1.png)
 
 ## Label priority
 
@@ -161,26 +223,43 @@ From the project label list page and the group label list page, you can subscrib
 > - Introduced in GitLab 8.9.
 > - Priority sorting is based on the highest priority label only. [This discussion](https://gitlab.com/gitlab-org/gitlab-ce/issues/18554) considers changing this.
 
-Labels can have relative priorities, which are used in the "Label priority" and "Priority" sort orders of the issue and merge request list pages.
+Labels can have relative priorities, which are used in the "Label priority" and
+"Priority" sort orders of the issue and merge request list pages.
+
+From the project label list page, star a label to indicate that it has a priority.
+
+![Labels prioritized](img/labels_prioritized_v12_1.png)
+
+Drag starred labels up and down the list to change their priority. Higher in the list
+means higher priority. Prioritization happens at the project level, only on the project
+label list page, and not on the group label list page.
 
-From the project label list page, star a label to indicate that it has a priority. Drag starred labels up and down to change their priority. Higher means higher priority. Prioritization happens at the project level, only on the project label list page, and not on the group label list page. However, both project and group labels can be prioritized on the project label list page since both types are displayed on the project label list page.
+However, both project and group
+labels can be prioritized on the project label list page since both types are displayed
+on the project label list page.
 
-![Labels prioritized](img/labels_prioritized.png)
+![Drag to change label priority](img/labels_drag_priority_v12_1.gif)
 
-On the project and group issue and merge request list pages, you can sort by `Label priority` and `Priority`, which account for objects (issues and merge requests) that have prioritized labels assigned to them.
+On the merge request and issue pages, for both groups and projects, you can sort by `Label priority`
+and `Priority`, which account for objects (issues and merge requests) that have prioritized
+labels assigned to them.
 
 If you sort by `Label priority`, GitLab considers this sort comparison order:
 
 - Object with a higher priority prioritized label.
 - Object without a prioritized label.
 
-Ties are broken arbitrarily. (Note that we _only_ consider the highest prioritized label in an object, and not any of the lower prioritized labels. [This discussion](https://gitlab.com/gitlab-org/gitlab-ce/issues/18554) considers changing this.)
+Ties are broken arbitrarily. Note that we _only_ consider the highest prioritized label
+in an object, and not any of the lower prioritized labels. [This discussion](https://gitlab.com/gitlab-org/gitlab-ce/issues/18554)
+considers changing this.
 
 ![Labels sort label priority](img/labels_sort_label_priority.png)
 
 If you sort by `Priority`, GitLab considers this sort comparison order:
 
-- Object's assigned [milestone](milestones/index.md)'s due date is sooner, provided the object has a milestone and the milestone has a due date. If this isn't the case, consider the object having a due date in the infinite future.
+- Due date of the assigned [milestone](milestones/index.md) is sooner, provided
+  the object has a milestone and the milestone has a due date. If this isn't the case,
+  consider the object having a due date in the infinite future.
 - Object with a higher priority prioritized label.
 - Object without a prioritized label.