This is the online manual for Photivo. Have a look at the navigation pane on the left. From there your can reach every article available on this wiki.
If you are new to Photivo you might want to begin with the general article about using Photivo. It also contains a list of all the mouse actions and keyboard shortcuts.
All of Photivo’s tools and filters are explained in the Tabs section. (Well, they will be once the section is finished. ) You can also reach the help for a specific tool directly from Photivo’s via its help function.
Please have also a look at the Spanish Photivo manual kindly provided by Juan Cesar Jover.