Previewing the current settings
Each preview pane shows the original image. To view how the
selected file format and other settings will affect the image, select the
Show Preview option above a preview pane. Canvas will apply all
the settings in the dialog box to the preview image. If you change a
setting, Canvas will apply the new setting.
Image file information
When Show Preview is selected, the esti-
mated file size and the number of colors in the image appear above
the active preview pane. The first value is the estimated file size in
kilobytes. The second value is the number of discrete colors that will
be saved in a GIF file; the value is not shown for JPEG format.
JPEG options
To use JPEG format, select JPEG from the Format menu. Canvas
applies the JPEG format and settings to the active preview pane.
Quality
Enter a percentage value from 1-100%. Higher Quality val-
ues result in less compression and better retention of original image
quality.
Smoothing
Enter a smoothing value from 1 to 6. JPEG compres-
sion can cause color blocks to appear in an image. Smoothing softens
the image to make color blocks less noticeable. Higher values pro-
duce more smoothing.
Progressive
Select this option to create a JPEG file that web brows-
ers can display at increasing resolution as the image is loaded.
Downsampling
This option can help improve compression. Down-
sampling reduces the image resolution by averaging color values