Choose Save As from the File menu.
Double-click a folder name in the Folder list to open it.
Type the name of the file in the Enter file name field.
Select the file format in which you want your file written.
For a list of the formats, see "Image Viewer File Formats".
Choose a compression method from the Compression menu button.
The default is None (no compression); compressed files require less disk space.
Choose the number of colors to save for your file from the Colors menu button.
The choices depend on the type of monitor you have.
Image Viewer saves your file in the specified format.