[QUOTE=beretgascon;429485]...the mystical world of kerning...
Kerning and indeed tracking and leading are not really that recondite a subject.
Kerning allows the adjustment of the spacing between 2 neighbouring characters, especially those that do not have vertical lines, for example 7 W, which often have a gap between them far greater that between upright characters such as N E, which is different depending which font is used.
Those of you who use Illustrator will recognise this screenshot from the font panel.
You will notice that they use the AV example in their icons for kerning and tracking.
By the by, it wrankles somewhat that Designer uses the terms tracking and kerning, but does not maintain this accuracy by refering to line spacing rather than the correct term - leading.
By the way, Frank, I think that the subject of fonts and other matters typographical warrants a forum of its own, being at least as relevant as 3D, for example.