Prolog Elements
Toggle
In the Content Editor, you can show the prolog by clicking the gear icon and selecting Show Prolog. Deselecting it hides the prolog from the Content Editor.
Collapse and Expand Prolog
You can collapse and expand the prolog content by pressing the Collapse/Expand Prolog (+) or (-) button. This action minimizes the prolog rather than completely removing it from the Content Editor.