Font Info view shows all available information for selected font from Font Samples Tab.
Some fonts doesn't have all information, due to differences in font types or just because font designers decide what information shall be stored in a font.
Definition: Kerning is the adjustment of space between pairs of letters to make them more visually appealing. Some type comes with kerning pairs, commonly kerned pairs of letters with the spacing already adjusted for best visual appearance so that manual kerning of headlines and subheads is unnecessary. Not all programs can access the kerning pairs found in some fonts. Other programs not only read the built-in kerning information, but can also edit the kerning pairs to change the kerning or add additional kerning pairs.
Example: Some commonly kerned pairs include Wa, To, and Ya. Some typefaces may have hundreds of kerning pairs defined.
The Family Kind digit is used to trigger additional, as yet undeveloped, extensions to the PANOSE classification system. In the current incarnation of PANOSE a large amount of information is stored for text and display faces for the purposes of font matching and replacement. Script and decorative fonts receive little classification, but enough to separate them from the text and display faces as well as from each other.
This digit describes the appearance of the serifs used in a font design and groups them into one of 14 general categories. Serif and sans serif faces are classified within this digit.
The Weight digit classifies the appearance of a font's stem thickness in relation to its height. It offers ten gradations, ranging from Very Light to Extra Black.
The Proportion digit describes the relative proportions of the characters in the font. Distinguishes Monospaced from Proportional, Modern from Old Style, and Extended from Condensed.
Contrast The Contrast digit describes the ratio between the thickest and narrowest points on the letter 'O.' The uppercase 'O' is used because it is generally of higher contrast than the other characters of the alphabet.
The Stroke Variation digit further details the contrast trait by describing the kind of transition that occurs as the stem thickness changes on rounded glyph shapes.
The Letter form digit differentiates between normal and oblique fonts and describes the roundness of the character shapes.
The Midline digit describes the placement of the midline and the treatment of diagonal stem apexes.
The X-height digit describes the relative height of lowercase characters and the treatment of uppercase glyphs with diacritical marks