Begin your artwork with a layout sheet placed under your transparent or
translucent paper. Make this sheet from gridded paper and indicate the
aperture outline for viewgraphs, slides, and television cards. Mark the true
center and the optical center distinctly. Place three or four registration marks
outside of the largest aperture opening to key masters and overlays for color
Figure 2-20 shows a lavout sheet.
Figure 2-20. A layout sheet.
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