Computer drawn characters use the Hershey font set and are, in decreasing detail, Complex, Italic, Duplex, and Simplex. The font type is specified by its first character. Standard font sizes are specified as 0-3 for the four Tektronix sizes from largest to smallest. Sizes larger than ten are assumed to be in display units and allow smaller or larger characters than the standard set to be used. The font size may be set separately for headings, tickmark labels, axis labels, time, plate scale, and magnitude scale table.
Font type is the same for heading, tick, and axis labels.
If the default automatic grid spacing has been specified, an optimum spacing is program-selected when zooming. If in menu mode and plotting to a specific plate scale, a new plate scale is prompted for when zooming. Portions of images can thus be mapped in sky coordinates rather than in rows and columns.