To open Picasa 2 Help, choose Help > Help Contents and Index, press , or choose a specific topic from the Help menu. You can also click a button in a Picasa dialog box or another part of the interface. To view Help topics on the Contents tab, refer to the figure below.
In addition to browsing topics on the Contents tab, you can click the Search tab to search Picasa 2 Help for topics that contain certain text.
Enter search text in the box and then click the List Topics button. Relevant topics appear in a list below.
Select a topic and click Display to view the selected Help text.