User Guide

Chapter 7: Sprite Technology
In particular, you must display transfer mode effects in CMYK if the document will be separated for
printing with process (CMYK) colors. Otherwise, the color separations could produce colors that are
completely different from the colors you see on screen.
For an example of this effect, draw several overlapping objects with different colors. Set the transfer
mode of the front object to Difference (see "Available transfer modes" on page 685). Choose Layout |
Display Options. In the Display Options manager, change the Mode from RGB to CMYK. Click OK to
close the manager. To refresh the screen, press F5. You will probably see a significant change in
colors when you switch from RGB to CMYK mode.
Select Grayscale from the menu to lessen the required memory if working on complex
graphics or editing images. In Grayscale mode, your screen redraws faster than in CMYK or
RGB.
To set the color mode for screen compositing:
1. Choose Layout | Display Options.
2. Select Grayscale, RGB, or CMYK in the Mode menu in the Display Options manager. Choose
RGB for effects that will displayed in RGB colors. Choose CMYK if you are using CMYK colors
in a document that will be printed with process colors.
Transparency and printing
You can use transparency effects to create stunning images and complex illustrations. As with any
graphic effects, however, images that appear perfect on screen can cause problems or produce
unexpected results when you print a document. This section discusses some issues you should keep
in mind to help ensure that your documents print successfully.
Canvas uses special techniques to print some transparency effects. Canvas can send an instruction
to print an opaque rectangle, for example, to most printers; however, to print a transparent
rectangle, Canvas usually converts the object to an image. This process is called rasterizing or
rendering. Canvas then sends the image data to the printer.
In the Print dialog box, you can select options for printing objects and colors. The options can affect
the time required to print a document, and how well colors match among objects.
Output resolution of transparency effects
You can specify an output resolution for a transparent object. If you don’t specify the resolution,
Canvas selects the resolution based on the following guidelines:
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