You can right click on the add file button. It should appear in the file tree section area, on top. You then choose the name of the file, and press enter. The file is then created. If you want to use html to link it to that page, you can do:

<a href='the-new-html-file.html' class='css-class'>Click me to got to the new file!</href>

Please upvote if you found this useful. Thanks!

well, think off more ideas. Like a blog,...