You can edit things in two ways - a simple "on screen change", or "deeper editing" with the bells and whistles.
Some things are simple - for example, the "summary" and "notes" fields in a Note, or a "tasklet", or a "quick note". Where possible, SyneMind allows you to edit those from the page itself - click an "edit" button, change the text as needed, save... This works for plain text fields only.
Other fields are more complicated, though. The "content" fields of a Note or Task allow not only rich text formatting, but also adding internal or external links, embedding documents etc. Editing these has to happen in a special editing interface which supports all of these options. This interface also supports "drafts": any change you make can be saved as a draft which will be kept in the backend while what you see in the frontend will remain unchanged. Or, you click "publish" after your edit, which will publish the change.
In the latter case, the system will save the earlier "revision" so you can track the changes later, and potentially restore to the older version. This feature is not supported for the simple text edit through on-page editing.