A transparency for use with an overhead projector

Usage examples of viewgraph.

It was an honor to be here and he had prepared for weeks, rehearsing with Channing, tailoring his viewgraphs, making up four-color computer graphics to show sinuous flows and ruby-red plasma currents.

Benjamin had not really intended it that way, had left the three viewgraphs out because they seemed a minor digression of little interest to the hard-nosed astrophysicists who made up most of the audience.

He followed with two viewgraphs giving the statistical argument, thick lines of calculations.