The best place to start learning QDL is to edit your Sandbox. There you can do anything you want, and it's only visible to you (unless you explicitly grant Rights to other users).

1. Go to QDL / My... / Sandbox.
2. Click the Action Menu icon (), and select the New Inside option ().
3. The inline version of the TinyMCE editor is displayed. Enter whatever text you want. There are a few formatting options at the bottom of the editor, for stuff like italics, bold, lists, etc.
4. To use the full complement of editing features, click the Edit Full Screen button at the bottom left.
5. Click the Submit button at the bottom right to commit your changes to the database, and return to the navigation mode.

To go back and edit a post, simply:

1. Click the Action Menu icon (), and select one of the Edit options ().

To view the properties of posts that you have created:

1. Click the Action Menu icon (), and position the cursor over the Metadata option ().

To edit the properties of a post:

1. Click the Action Menu icon (), and next to the Metadata option (), click edit.