A clearly legible font should be utilized. Fonts should have true ascenders and descenders, uniform stroke width, and uniform aspect ratio.
Additional Information:
Preference should be given to simple styles. Script and other highly stylized fonts (e.g., shadow, calligraphy) should be avoided. Avoid typefaces that: have extended serifs, internal patterns, or stripes; are italicized, stenciled, shadowed or 3-dimensional; appear like handwritten script or like Old English script; or are distorted to look tall and thin or wide and fat. The basic evaluation criterion for font selection should be legibility.