Improve documentation on how to create issue

doc.zih.tu-dresden.de/docs/contrib/howto_contribute.md

@@ -4,14 +4,21 @@
 
     Ink is better than the best memory.
 
+In principle, there are three possible ways how to contribute to this documentation.
+
 ## Contribute via Issue
 
 Users can contribute to the documentation via the
 [GitLab issue tracking system](https://gitlab.hrz.tu-chemnitz.de/zih/hpcsupport/hpc-compendium/-/issues).
 For that, open an issue to report typos and missing documentation or request for more precise
-wording etc.  ZIH staff will get in touch with you to resolve the issue and improve the
+wording etc. ZIH staff will get in touch with you to resolve the issue and improve the
 documentation.
 
+??? tip "GIF: Create GitLab Issue"
+
+    ![Something](misc/create_gitlab_issue.gif)
+    {: align=center}
+
 !!! warning "HPC support"
 
     Non-documentation issues and requests need to be send as ticket to
@@ -20,8 +27,14 @@ documentation.
 ## Contribute via Web IDE
 
 GitLab offers a rich and versatile web interface to work with repositories. To fix typos and edit
-source files, just select the file of interest and click the `Edit` button. A text and commit
-editor are invoked: Do your changes, add a meaningful commit message and commit the changes.
+source files, follow these steps:
+
+1. Navigate to the repository at
+[https://gitlab.hrz.tu-chemnitz.de/zih/hpcsupport/hpc-compendium](https://gitlab.hrz.tu-chemnitz.de/zih/hpcsupport/hpc-compendium) and log in.
+1. Select the right branch.
+1. Select the file of interest in `doc.zih.tu-dresden.de/docs/...` and click the `Edit` button.
+1. A text and commit editor are invoked: Do your changes, add a meaningful commit message and commit
+   the changes.
 
 The more sophisticated integrated Web IDE is reached from the top level menu of the repository or
 by selecting any source file.
@@ -29,12 +42,9 @@ by selecting any source file.
 Other git services might have an equivalent web interface to interact with the repository. Please
 refer to the corresponding documentation for further information.
 
-<!--This option of contributing is only available for users of-->
-<!--[gitlab.hrz.tu-chemnitz.de](https://gitlab.hrz.tu-chemnitz.de). Furthermore, -->
-
 ## Contribute Using Git Locally
 
 For experienced Git users, we provide a Docker container that includes all checks of the CI engine
 used in the back-end. Using them should ensure that merge requests will not be blocked
 due to automatic checking.
-For details, see [Work Locally Using Containers](contribute_container.md).
+For details, refer to the page [Work Locally Using Containers](contribute_container.md).