Gerber OMEGA CP Reference Manual page 630

616 Chapter 54:
Setting Up the GSPPlot Window
To setup Thumbnails in GSPPlot
1 In GSPPlot click Tools > Options to open the Options dialog box.
2 In the window at the left click Image.
3 Use the Resolution slider to change the image resolution to Low, Medium or High.
4 Use the slider to change the Bits per Pixel to 1, 4, 8, or 24.
5 Click Apply.