As a teacher, you can adjust your class settings to make block view available or unavailable to your students.
If your class is currently set to Code View only, you will see a banner at the top or class page with the option to "Turn on Blocks."
If you would like to turn OFF Block View, visit your class settings and uncheck the option to Show Blocks:
Students also have the option to switch between block and code view. From their editor page, they will see a text bar that reads, "Switch to Code View"
Or, "Switch to Block View"
If the student would like to change their default settings, they can click on the gear symbol in the upper right hand corner of their editor page. From here they can change the default of their editor to show block view or code view upon opening.