There are thousands of images available by clicking on the 
Image Search button 

Keywords
If you want to see available keywords, choose "Catalog Properties" from the "Catalog Menu," then click "Statistics," then click "Calculate." 

Speed
To increase speed, copy the catalogue file to your hard drive.  You can also combine it with other Portfolio based catalogues on your hard drive.

Searching
To see an image's keywords, click on it and choose "Get Info" from the "Item" menu.  Double-Click on any keyword in the "Info" window to see all the images that correspond with the keyword, or narrow search by adding keywords.