Guide settings are managed by clicking on settings (⚙️) below the image on the left. Only admins have access to these options (and can see the cog wheel):

Setting options include:

1. General Settings
2. Publish Settings
3. Members
4. Analytics
5. Export to PDF (not available while in draft)
6. Archive Guide

In addition to the Settings (⚙️), you can also notify subscribers (not available while in draft) by clicking on the notification icon (paper airplane), Search the content (????) or add the it to another Space (connected dots).