diff --git a/doc/ci/yaml/README.md b/doc/ci/yaml/README.md
index eb78ceacf26..9ebc0569127 100644
--- a/doc/ci/yaml/README.md
+++ b/doc/ci/yaml/README.md
@@ -259,34 +259,26 @@ For more information, see see [Available settings for `services`](../docker/usin
 
 > Introduced in GitLab 8.7 and requires GitLab Runner v1.2.
 
-`before_script` is used to define the command that should be run before all
-jobs, including deploy jobs, but after the restoration of [artifacts](#artifacts).
+`before_script` is used to define a command that should be run before each
+job, including deploy jobs, but after the restoration of any [artifacts](#artifacts).
 This must be an an array.
 
-`after_script` is used to define the command that will be run after all
-jobs, including failed ones. This must be an an array.
+Scripts specified in `before_script` are concatenated with any scripts specified
+in the main [`script`](#script), and executed together in a single shell.
 
-Scripts specified in `before_script` are:
+`after_script` is used to define the command that will be run after each
+job, including failed ones. This must be an an array.
 
-- Concatenated with scripts specified in the main `script`. Job-level
-  `before_script` definition override global-level `before_script` definition
-  when concatenated with `script` definition.
-- Executed together with main `script` script as one script in a single shell
-  context.
-
-Scripts specified in `after_script`:
+Scripts specified in `after_script` are executed in a new shell, separate from any
+`before_script` or `script` scripts. As a result, they:
 
 - Have a current working directory set back to the default.
-- Are executed in a shell context separated from `before_script` and `script`
-  scripts.
-- Because of separated context, cannot see changes done by scripts defined
-  in `before_script` or `script` scripts, either:
-  - In shell. For example, command aliases and variables exported in `script`
-    scripts.
-  - Outside of the working tree (depending on the Runner executor). For example,
-    software installed by a `before_script` or `script` scripts.
+- Have no access to changes done by scripts defined in `before_script` or `script`, including:
+  - Command aliases and variables exported in `script` scripts.
+  - Changes outside of the working tree (depending on the Runner executor), like
+    software installed by a `before_script` or `script` script.
 
-It's possible to overwrite the globally defined `before_script` and `after_script`
+It's possible to overwrite a globally defined `before_script` or `after_script`
 if you set it per-job:
 
 ```yaml
diff --git a/doc/development/fe_guide/style_guide_scss.md b/doc/development/fe_guide/style_guide_scss.md
index 07c87920dab..54d41b42c77 100644
--- a/doc/development/fe_guide/style_guide_scss.md
+++ b/doc/development/fe_guide/style_guide_scss.md
@@ -27,7 +27,7 @@ New utility classes should be added to [`utilities.scss`](https://gitlab.com/git
 | Font size | `.text-{size}` | `.text-2` |
 
 - `{variant}` is one of 'primary', 'secondary', 'success', 'warning', 'error'
-- `{shade}` is on of the shades listed on [colors](https://design.gitlab.com/product-foundations/colors/)
+- `{shade}` is one of the shades listed on [colors](https://design.gitlab.com/product-foundations/colors/)
 - `{size}` is a number from 1-6 from our [Type scale](https://design.gitlab.com/product-foundations/typography)
 
 #### When should I create component classes?
diff --git a/doc/install/requirements.md b/doc/install/requirements.md
index 8b53ee7c3e1..ecd6516bd2e 100644
--- a/doc/install/requirements.md
+++ b/doc/install/requirements.md
@@ -35,7 +35,7 @@ Please see the [installation from source guide](installation.md) and the [instal
 ### Microsoft Windows
 
 GitLab is developed for Linux-based operating systems.
-It does **not** run on Microsoft Windows, and we have no plans to support it in the near future. For the latest development status view this [issue](https://gitlab.com/gitlab-org/gitlab-foss/issues/46567).
+It does **not** run on Microsoft Windows, and we have no plans to support it in the near future. For the latest development status view this [issue](https://gitlab.com/gitlab-org/gitlab/issues/22337).
 Please consider using a virtual machine to run GitLab.
 
 ## Ruby versions
diff --git a/doc/user/group/clusters/index.md b/doc/user/group/clusters/index.md
index d3a3a1ea283..1fe456902a2 100644
--- a/doc/user/group/clusters/index.md
+++ b/doc/user/group/clusters/index.md
@@ -61,10 +61,15 @@ managed by GitLab, resources for your projects will be automatically created. Se
 [Access controls](../../project/clusters/add_remove_clusters.md#access-controls) section for details on which resources will
 be created.
 
-If you choose to manage your own cluster, project-specific resources will not be created
-automatically. If you are using [Auto DevOps](../../../topics/autodevops/index.md), you will
-need to explicitly provide the `KUBE_NAMESPACE` [deployment variable](../../project/clusters/index.md#deployment-variables)
-that will be used by your deployment jobs.
+For clusters not managed by GitLab, project-specific resources will not be created
+automatically. If you are using [Auto DevOps](../../../topics/autodevops/index.md)
+for deployments with a cluster not managed by GitLab, you must ensure:
+
+- The project's deployment service account has permissions to deploy to
+  [`KUBE_NAMESPACE`](../../project/clusters/index.md#deployment-variables).
+- `KUBECONFIG` correctly reflects any changes to `KUBE_NAMESPACE`
+  (this is [not automatic](https://gitlab.com/gitlab-org/gitlab/issues/31519)). Editing
+  `KUBE_NAMESPACE` directly is discouraged.
 
 NOTE: **Note:**
 If you [install applications](#installing-applications) on your cluster, GitLab will create
diff --git a/doc/user/operations_dashboard/img/index_operations_dashboard_top_bar_icon.png b/doc/user/operations_dashboard/img/index_operations_dashboard_top_bar_icon.png
deleted file mode 100644
index d4db5e88672..00000000000
Binary files a/doc/user/operations_dashboard/img/index_operations_dashboard_top_bar_icon.png and /dev/null differ
diff --git a/doc/user/operations_dashboard/index.md b/doc/user/operations_dashboard/index.md
index 649a95a5f3a..8faf6cda1a8 100644
--- a/doc/user/operations_dashboard/index.md
+++ b/doc/user/operations_dashboard/index.md
@@ -5,10 +5,7 @@
 The Operations Dashboard provides a summary of each project's operational health,
 including pipeline and alert status.
 
-The dashboard can be accessed via the top bar, by clicking on the new
-dashboard icon:
-
-![Operations Dashboard icon in top bar](img/index_operations_dashboard_top_bar_icon.png)
+The dashboard can be accessed via the top bar, by clicking **More > Operations**.
 
 ## Adding a project to the dashboard
 
diff --git a/doc/user/project/clusters/index.md b/doc/user/project/clusters/index.md
index 1867b9c0198..c5c2c2c07e7 100644
--- a/doc/user/project/clusters/index.md
+++ b/doc/user/project/clusters/index.md
@@ -247,7 +247,7 @@ GitLab CI/CD build environment.
 | -------- | ----------- |
 | `KUBE_URL` | Equal to the API URL. |
 | `KUBE_TOKEN` | The Kubernetes token of the [environment service account](add_remove_clusters.md#access-controls). |
-| `KUBE_NAMESPACE` | The Kubernetes namespace is auto-generated if not specified. The default value is `<project_name>-<project_id>-<environment>`. You can overwrite it to use different one if needed, otherwise the `KUBE_NAMESPACE` variable will receive the default value. |
+| `KUBE_NAMESPACE` | The namespace associated with the project's deployment service account. In the format `<project_name>-<project_id>-<environment>`. For GitLab-managed clusters, a matching namespace is automatically created by GitLab in the cluster. |
 | `KUBE_CA_PEM_FILE` | Path to a file containing PEM data. Only present if a custom CA bundle was specified. |
 | `KUBE_CA_PEM` | (**deprecated**) Raw PEM data. Only if a custom CA bundle was specified. |
 | `KUBECONFIG` | Path to a file containing `kubeconfig` for this deployment. CA bundle would be embedded if specified. This config also embeds the same token defined in `KUBE_TOKEN` so you likely will only need this variable. This variable name is also automatically picked up by `kubectl` so you won't actually need to reference it explicitly if using `kubectl`. |
@@ -260,6 +260,16 @@ service account of the cluster integration.
 NOTE: **Note:**
 If your cluster was created before GitLab 12.2, default `KUBE_NAMESPACE` will be set to `<project_name>-<project_id>`.
 
+When deploying a custom namespace:
+
+- The custom namespace must exist in your cluster.
+- The project's deployment service account must have permission to deploy to the namespace.
+- `KUBECONFIG` must be updated to use the custom namespace instead of the GitLab-provided default (this is [not automatic](https://gitlab.com/gitlab-org/gitlab/issues/31519)).
+- If deploying with Auto DevOps, you must *also* override `KUBE_NAMESPACE` with the custom namespace.
+
+CAUTION: **Caution:**
+GitLab does not save custom namespaces in the database. So while deployments work with custom namespaces, GitLab's integration for already-deployed environments will not pick up the customized values. For example, [Deploy Boards](../deploy_boards.md) will not work as intended for those deployments. For more information, see the [related issue](https://gitlab.com/gitlab-org/gitlab/issues/27630).
+
 ### Troubleshooting
 
 Before the deployment jobs starts, GitLab creates the following specifically for