When you access the ACME site, by default, the site content is in the published mode and you cannot edit them.
When hovering your cursor over content, you can see which enables you to quickly edit this content in Sites Explorer. You can take advantage of this feature to submit content to a page.
For single content viewer (SCV), you can see the current state of the content, the Edit Content icon and Preferences icon.
For content list viewer (CLV), you can see the current state of the content, the Edit Content icon, the Preferences icon, the Add Content icon and the Manage Content icon.