creation supersede

external/contribute/supersede/supersede.md

+# Supersede a Merge Request
+
+In some cases, it might be useful to move the Merge Request of a branch opened by someone else to your own fork.
+
+1. Open *Visual Studio Code*.
+2. Select the ***develop*** branch and synchronize it.
+3. In ***Terminal***, click on ***New Terminal***.
+
+<div align="center">
+<img src="img/img1.png" width="700">
+</div>
+
+4. This step needs to be performed only the first time.
+
+In the *Terminal window*, type *git remote add upstream [paste the SSH Key]*.
+You can copy the SSH key of the repository by clicking on Clone - copy on the repository page.
+
+<div align="center">
+<img src="img/img3.png" width="700" >
+</div>
+<div align="center">
+<img src="img/img2.png" width="300" >
+</div>
+
+5. In the *Terminal window*, type *git mr upstream [number of the merge request]*.
+
+    You are now on the branch of the merge request.
+
+6. Push it to your fork by clicking on the cloud icone on the bottom left of your screen.
+
+<div align="center">
+<img src="img/img4.png"  width="100"  >
+</div>
+
+7. On GitLab, open a new Merge Request with the newly created branch.
+    
+    In description, write ***Supersedes ![number of the original MR]***.
+
+8. In the original MR, write in the description ***Superseded by ![number of the newly created MR]*** and close the MR.
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