In non-raster mode, the current palette contains all the available colors. In raster mode, indexed color selection uses the palette, but direct selection does not.
Default palettes are created by all the PCL color modes (Black and White, Simple Color, PCL Imaging, and HP-GL/2 Imaging). The active palette may be modified when in the PCL Imaging or HP-GL/2 imaging modes, but not when in the Simple Color or Black and White modes. When switching between PCL 5 and HP-GL/2 contexts, the active palette is automatically transferred.
Multiple palettes can exist in the system via the Palette ID and Palette Stack mechanism. However, only one palette at a time can be active. A palette created in the PCL context remains active and unchanged when switching to the HP-GL/2 context, and a palette created in the HP-GL/2 context remains active and unchanged when switching to the PCL context. Performing a reset or entering PJL overwrites the active palette with the default black and white palette.
Whenever a new palette is created, the currently or previously active palette is destroyed. A new palette is created by power-on and also by the following commands:
•PCL Reset (?E)
•Simple Color (?*r#U)
•Configure Image Data (?*v#W)
•HP-GL/2 Initialize (IN)
The active palette can be saved by pushing it onto the palette stack with the Push/Pop Palette command (?*p#P). Popping a palette from the stack destroys the active palette—the popped palette becomes the active palette.
