Converting to indexed color (Photoshop)

Converting to indexed color (Photoshop)

Converting to indexed color reduces the number of colors in the image to at most 256- the standard number of colors supported by the GIF and PNG-8 formats and many multi- media applications. This conversion reduces file size by deleting color information from the image.

To convert to indexed color, you must start with either a grayscale or RGB image.

To convert a grayscale or RGB image to indexed color:

1 Choose Image > Mode > Indexed Color.

Note: All visible layers will be flattened; any hidden layers will be discarded.

For grayscale images, the conversion happens automatically. For RGB images, the Indexed

Color dialog box appears.

2 Select Preview the Indexed Color dialog box to display a preview of the changes.

3 Specify conversion options. (See "Conversion options for indexed-color images

(Photoshop)" on section 98.)