Updated Git Tips (markdown)

Git-Tips.md

@@ -46,6 +46,16 @@ More information is available in the [Contributing guidelines][contributing].
 1. Once you're ready, push your local commits (`git push`)
     - for the first commit on a new branch, use (`git push -u origin <branch>`)
 
+# Pull Requests
+
+1. On GitHub, [create a Pull Request](https://github.com/markcheret/footnotes/compare) for your new branch to `main`
+    - if it's not ready yet, you can create a draft Pull Request that can't be merged until you un-draft it (but people can still review and comment on it)
+1. Tag any related Issues in the PR
+    - if you want the PR to automatically close the Issues on merge, say 'Closes #<number>' or 'Fix #<number>'
+1. If applicable, assign the PR to a Project and/or Milestone
+    - Projects are grouping of Issues and PRs with a given theme/objective
+    - Milestones are target states and the Issues and PRs that are required to reach that state
+
 # Branches
 
 1. You can delete local branches when you are done with them (`git branch -d <branch name>`)