Edited and reordered topics in Multi-project pipelines

doc/ci/jobs/job_control.md

@@ -222,7 +222,7 @@ check the value of the `$CI_PIPELINE_SOURCE` variable:
 | `external_pull_request_event` | When an external pull request on GitHub is created or updated. See [Pipelines for external pull requests](../ci_cd_for_external_repos/index.md#pipelines-for-external-pull-requests).                                            |
 | `merge_request_event`         | For pipelines created when a merge request is created or updated. Required to enable [merge request pipelines](../merge_request_pipelines/index.md), [merged results pipelines](../merge_request_pipelines/pipelines_for_merged_results/index.md), and [merge trains](../merge_request_pipelines/pipelines_for_merged_results/merge_trains/index.md). |
 | `parent_pipeline`             | For pipelines triggered by a [parent/child pipeline](../parent_child_pipelines.md) with `rules`. Use this pipeline source in the child pipeline configuration so that it can be triggered by the parent pipeline.                |
-| `pipeline`                    | For [multi-project pipelines](../multi_project_pipelines.md) created by [using the API with `CI_JOB_TOKEN`](../multi_project_pipelines.md#triggering-multi-project-pipelines-through-api), or the [`trigger`](../yaml/README.md#trigger) keyword. |
+| `pipeline`                    | For [multi-project pipelines](../multi_project_pipelines.md) created by [using the API with `CI_JOB_TOKEN`](../multi_project_pipelines.md#create-multi-project-pipelines-by-using-the-api), or the [`trigger`](../yaml/README.md#trigger) keyword. |
 | `push`                        | For pipelines triggered by a `git push` event, including for branches and tags.                                                                                                                                                  |
 | `schedule`                    | For [scheduled pipelines](../pipelines/schedules.md).                                                                                                                                                                            |
 | `trigger`                     | For pipelines created by using a [trigger token](../triggers/README.md#trigger-token).                                                                                                                                           |

doc/ci/parent_child_pipelines.md

@@ -85,7 +85,7 @@ microservice_a:
 
 The maximum number of entries that are accepted for `trigger:include:` is three.
 
-Similar to [multi-project pipelines](multi_project_pipelines.md#mirroring-status-from-triggered-pipeline),
+Similar to [multi-project pipelines](multi_project_pipelines.md#mirror-status-of-a-triggered-pipeline-in-the-trigger-job),
 we can set the parent pipeline to depend on the status of the child pipeline upon completion:
 
 ```yaml
@@ -185,5 +185,8 @@ For an overview, see [Nested Dynamic Pipelines](https://youtu.be/C5j3ju9je2M).
 
 ## Pass CI/CD variables to a child pipeline
 
-You can [pass CI/CD variables to a downstream pipeline](multi_project_pipelines.md#passing-cicd-variables-to-a-downstream-pipeline)
-the same way as for multi-project pipelines.
+You can pass CI/CD variables to a downstream pipeline using the same methods as
+multi-project pipelines:
+
+- [By using the `variable` keyword](multi_project_pipelines.md#pass-cicd-variables-to-a-downstream-pipeline-by-using-the-variables-keyword).
+- [By using variable inheritance](multi_project_pipelines.md#pass-cicd-variables-to-a-downstream-pipeline-by-using-variable-inheritance).

doc/ci/variables/README.md

@@ -581,7 +581,8 @@ You can override the value of a variable when you:
 1. Run a job manually in the UI.
 1. Use [push options](../../user/project/push_options.md#push-options-for-gitlab-cicd).
 1. Trigger a pipeline by using [the API](../triggers/README.md#making-use-of-trigger-variables).
-1. Pass variables to a [downstream pipeline](../multi_project_pipelines.md#passing-cicd-variables-to-a-downstream-pipeline).
+1. Pass variables to a downstream pipeline [by using the `variable` keyword](../multi_project_pipelines.md#pass-cicd-variables-to-a-downstream-pipeline-by-using-the-variables-keyword)
+   or [by using variable inheritance](../multi_project_pipelines.md#pass-cicd-variables-to-a-downstream-pipeline-by-using-variable-inheritance).
 
 The pipeline variables declared in these events take [priority over other variables](#cicd-variable-precedence).
 

doc/ci/yaml/README.md

@@ -1336,7 +1336,7 @@ pipeline based on branch names or pipeline types.
   | `external`               | When you use CI services other than GitLab. |
   | `external_pull_requests` | When an external pull request on GitHub is created or updated (See [Pipelines for external pull requests](../ci_cd_for_external_repos/index.md#pipelines-for-external-pull-requests)). |
   | `merge_requests`         | For pipelines created when a merge request is created or updated. Enables [merge request pipelines](../merge_request_pipelines/index.md), [merged results pipelines](../merge_request_pipelines/pipelines_for_merged_results/index.md), and [merge trains](../merge_request_pipelines/pipelines_for_merged_results/merge_trains/index.md). |
-  | `pipelines`              | For [multi-project pipelines](../multi_project_pipelines.md) created by [using the API with `CI_JOB_TOKEN`](../multi_project_pipelines.md#triggering-multi-project-pipelines-through-api), or the [`trigger`](#trigger) keyword. |
+  | `pipelines`              | For [multi-project pipelines](../multi_project_pipelines.md) created by [using the API with `CI_JOB_TOKEN`](../multi_project_pipelines.md#create-multi-project-pipelines-by-using-the-api), or the [`trigger`](#trigger) keyword. |
   | `pushes`                 | For pipelines triggered by a `git push` event, including for branches and tags. |
   | `schedules`              | For [scheduled pipelines](../pipelines/schedules.md). |
   | `tags`                   | When the Git reference for a pipeline is a tag. |
@@ -3561,13 +3561,13 @@ deploystacks: [vultr, data]
 Use `trigger` to define a downstream pipeline trigger. When GitLab starts a `trigger` job,
 a downstream pipeline is created.
 
-Jobs with `trigger` can only use a [limited set of keywords](../multi_project_pipelines.md#limitations).
+Jobs with `trigger` can only use a [limited set of keywords](../multi_project_pipelines.md#create-multi-project-pipelines-in-your-gitlab-ciyml-file).
 For example, you can't run commands with [`script`](#script), [`before_script`](#before_script),
 or [`after_script`](#after_script).
 
 You can use this keyword to create two different types of downstream pipelines:
 
-- [Multi-project pipelines](../multi_project_pipelines.md#creating-multi-project-pipelines-from-gitlab-ciyml)
+- [Multi-project pipelines](../multi_project_pipelines.md#create-multi-project-pipelines-in-your-gitlab-ciyml-file)
 - [Child pipelines](../parent_child_pipelines.md)
 
 [In GitLab 13.2](https://gitlab.com/gitlab-org/gitlab/-/issues/197140/) and later, you can
@@ -3642,7 +3642,7 @@ trigger_job:
     include: path/to/child-pipeline.yml
 ```
 
-Similar to [multi-project pipelines](../multi_project_pipelines.md#mirroring-status-from-triggered-pipeline),
+Similar to [multi-project pipelines](../multi_project_pipelines.md#mirror-status-of-a-triggered-pipeline-in-the-trigger-job),
 it's possible to mirror the status from a triggered pipeline:
 
 ```yaml