Added details for the example for how to avoid manually editing files

README.md

@@ -63,7 +63,60 @@ Both the xxx and motorVMC repos have a **solution** branch with tags for each st
 
 Note: the motorVMC module is only modified in section 4, so the only tags it has for later sections are 5.1 and 6.1.
 
-### Example: how to avoid manually editing files
+### How to avoid manually editing files
+
+**Example**: You've been following the instructions in the training until [step 5.7.2](https://git.aps.anl.gov/practical_beamline_controls_training/session_2/instructions/-/blob/main/5-Add-virtual-motors.md#572-modify-iocshvmccmd), which asks to you make a lot of change to **vmc.cmd**, but you'd rather not make those changes yourself.
+
+Do the following to see if there are any files you've modified/created manually:
+```
+$ git status
+```
+
+If git reports any "Changes not staged for commit" or "Untracked files", do the following to save your work to a **working** branch:
+
+```
+$ git stash
+$ git checkout -b working
+$ git stash apply
+$ git add ${IOC_DIR}/xxx
+$ git commit -m "Backup of my work before switching to a tag on the solution branch"
+```
+
+At this point you can safely proceed to step 5.7.3
+```
+$ git checkout 5.7.3
+```
+<details>
+<summary>output</summary>
+
+```
+Note: switching to '5.7.3'.
+
+You are in 'detached HEAD' state. You can look around, make experimental
+changes and commit them, and you can discard any commits you make in this
+state without impacting any branches by switching back to a branch.
+
+If you want to create a new branch to retain commits you create, you may
+do so (now or later) by using -c with the switch command. Example:
+
+  git switch -c <new-branch-name>
+
+Or undo this operation with:
+
+  git switch -
+
+Turn off this advice by setting config variable advice.detachedHead to false
+
+HEAD is now at 8a0470c Modified iocsh/vmc.cmd
+```
+</details>
+
+Git can also show you the changes that were made:
+
+```
+$ git show 5.7.3
+```
+Note: `git show <step_number>` is only useful if the previous step involved creating or modifying a file.
 
 ### Example: how to jump to a specific section