Typography
Ascender
The piece of a letter which rises above the x-height.
Descender
The piece of a letter which dips below the baseline.
Baseline
The imaginary line on which most letter characters sit.
Cap Line
The imaginary line that marks the upper boundary of capital letters and some lowercase letters' ascenders.
X-Height
Height of the typeface's lowercase letters.
Tracking / Letter Spacing
The uniform amounts of spacing between characters in a complete section of text.
Kerning
The horizontal spacing between two consecutive characters.
Leading
The vertical spacing between lines of text (from baseline to baseline).
