Apple Macintosh PhotoFlash - Manual (Page 46)

2 Drag to the right to choose the file format you want to use from the Save As submenu.
A dialog box appears showing the format options for the file format
you selected.
Note: If the image you’re saving uses fewer than millions of colors or fewer
than 256 grays, you can choose only the PICT or TIFF items in the Save As
submenu; the others are dimmed. You can’t increase the actual number of
colors used by an image, but you can change its setting to a higher number of
colors if you want to save it in one of the dimmed formats. For details, see
“Changing the Number of Colors Used by an Image” in Chapter 4,
“Manipulating Images.”
3 Adjust the settings in the dialog box.
For more information about each file format and its Save As dialog box, see
Chapter 6, “Converting and Compressing Files.”
4 Click Save.
35 Working With Image Files