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56 System manual E1
UserModifiable Color Palette
This option allows applications to modify the palette contents
dynamically. As indicated in figure 30, this mode reserves the
first 10 and last 10 entries in the palette for the Windows
operating system, but applications can manipulate the middle
236 entries. This is the standard palette mode as configured by
Windows.
Figure 30
Static Gray Palette including standard system colors
This option sets the palette to be a static set of 256 gray values.
Therefore, applications are denied the ability to dynamically
change or allocate palette entries. This prevents palette conflicts
between applications, which can cause image color values to
appear distorted in the background application.
As shown in figure 31, the 20 standard system colors are
converted from RGB to gray values. The rest of the 236 entries
from index 10 to 245 contain the missing gray values so that the
palette has the full 256 gray values within it.
Figure 31
Please note that dithering is not permitted while in this mode.
The Enable Dithering check box will be grayed-out, and dithering
will be automatically disabled regardless of whether this check
box is checked. This complies with the Windows standard