Apple DVD Studio Pro 4 - Manual (Page 103)

Be sure to disable anti-aliasing and avoid using soft edges. Depending on your graphics
application, choose to use a 1-bit or bitmap mode.
3 Depending on the graphics application you use, you may need to flatten the overlay
elements into a single layer.
Creating Advanced Overlays
To create advanced overlays, you first need to understand how they are used and the
difference between the chroma and grayscale methods.
The Four Colors in an Advanced Overlay
When creating an advanced overlay, you create your highlights by using up to four specific
colors. You can use a chroma method (using red, blue, black, and white as the four overlay
colors) or a grayscale method (using black, dark gray, light gray, and white as the four
overlay colors). You don’t have to use all four colors when creating an overlay, but you
will most likely use at least two.
Is White 0% or 100%?
Depending on your graphics background, you may assume white to be either 0% or
100%, with black being the opposite (100% or 0%, respectively). Previous versions of
DVD Studio Pro considered white to be 0%, while most video people would consider
white to be 100%. For the purposes of creating the light gray and dark gray colors used
by the grayscale method, you need to use the following values:
• If you consider white to be 0%: Use 33% for light gray and 66% for dark gray.
• If you consider white to be 100%: Use 66% for light gray and 33% for dark gray.
White is commonly used as the overlay’s background color. When creating the menu,
white’s transparency is usually set to 0. Any of the other three overlay colors can be used
for any aspect of the overlay.
For example, if you had a menu background with a group of buttons that were actually
just text, such as “Play Movie” and “Select Chapter,” initially your overlay would start as
all white. If you wanted the button text to change to green when each button was selected,
you’d need to add the text to the overlay and make it an overlay color such as light gray
(or dark gray or black—remember that you will set the green color as the “selected”
highlight color when you create the menu in DVD Studio Pro). If you wanted the text to
change to orange when each button was activated, you wouldn’t have to do anything
more to the overlay—you would just set the “activated” highlight color to orange when
you created the menu.
103 Chapter 6 Preparing Menu Assets