What's the difference between Visual mode and Text mode when creating or editing a post?

Note the tabs that allow you to switch between Visual and Text mode while writing or editing a post:

You can format text in a number of ways using the toolbar at the top of the main text field in Visual mode. Largo provides additional styles you can apply by using Text mode. Most basic text formatting can be done in Visual mode. If you don't see all the tools shown in the image above, click the Toolbar Toggle button:

Text Mode Tips and Tricks