Roman is the default font and the drawn character matches the typed characters. In other fonts, the drawn character may be different from that typed. The small character in the upper right corner of each character cell shows the letter to type to have the symbol appear. Roman, Greek, and Script are proportional-spaced fonts. Text Escape Codes.
Some graphics devices are able to display grayscale images.
By default, the displayed image will fill the viewport as currently defined. This will, in general distort the image since the aspect ratio of the viewport and image may not match. Image Display Commands Figure 2.12 shows some of the capabilities of the image display in igi. Graph A shows the default action, to fill the viewport with a positive representation of the data. B. The displayed image is widened to fill the viewport.