Here are some tips on using HackMD:
# Edit mode The tutorials are great, but to really make the most of them you need to view them in edit mode. That way you can view the source. Simply add `?both` to the end of the url - or click the `Check the source of this note` button at the start of a tutorial.
- https://hackmd.io/features?both#YouTube
# Resizing split view
You can drag the split view divider so that you have a wiki-sized preview of a page, and then lock this layout.