Turn on the Edit Mode, then hover your cursor over the content you want to edit, and click at the right corner. You will be directed to Sites Explorer with the document form for you to edit.

Make changes on the content, then click Save or Save & Close to accept your changes.

After closing the Edit form, the content is in the Document View.

Click to return to the site. In the Edit mode, your new content will be in the "Draft" state with its visible modifications.

Click to publish your edited content. Your content is now in the "Published" state.