|Pairwise Kerning:| allows tiny adjustments in the spacing following a character; expressed as a percent of an |em|, the approximate font size or width of the captital letter 'M'.
|Preview:| shows the adjusted character together with adjacent characters. The gray area shows the amount of kerning. The size of the characters is relative, and is shown as large as possible
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|Increase by 10%:| increments the spacing by 10% of an |em|; a maximum of 100% is permitted.
|Increase by 1%:| increments the spacing by 1% of an |em|; a maximum of 100% is permitted.
|Shrink by 1%:| decrements the spacing by 1% of an |em|; a maximum of -100% is permitted.
|Shrink by 10%:| decrements the spacing by 10% of an |em|; a maximum of -100% is permitted.
|Adjustment:| shows, and allows editing of the amount of kerning expressed as a percent of one |em|.