Hello Retta-
Thanks for reaching out, and thanks for using the Post and Page Builder for WordPress.
There are a few things that can cause this. Most commonly, you’ll just need to look for the Visual editor tab, at the top-right of the editor:
If you don’t see the Visual tab, it’s possible that your user profile may have the visual editor disabled. To check that, navigate to Users > All Users and click Edit underneath your username. Here, you’ll see an option at the top to Disable the visual editor when writing. If that’s checked, uncheck it and scroll down and click Update Profile: