For boldening and thinning via the glyph transformer I sincerely feel that percentages are the best and most intuitive parameters that can be used. The current width of the stroke is 125 funits and I wish to reduce it to 112, so horizontal thinning factor: 89.6%. Likewise for height of stroke I want to change 125 to 98, the value is 78.4%. This would make life a whole lot easier for me and I hope many others too!
As you can see in http://forum.high-logic.com:9080/t/units-used-in-bold-thin-and-hollow-transformations/3420/1 and http://forum.high-logic.com:9080/t/scaling-a-glyph-while-maintaining-stroke-width/3381/1 the current parameter input totally baffles me!
Agreed. This would be a significant improvement, especially when applying bold or thin transforms to glyphs with a high contrast. This illustration shows what should happen if both horizontal and vertical strokes were set to be 50% bolder. Or one might want to make horizontal strokes bolder by only 25% and vertical strokes bolder by 200%
At the moment, bold transformations make a pig’s ear out of fine strokes such as serifs.

If the request is implemented, could it be done as an optional choice rather than as a replacing of the present system please?
I like using measurements in a known number of font units rather than using a percentage with the possibility of rounding errors.
However, I am in favour of people having a choice, so if both systems could be available using option buttons on a dialogue panel, then that would be good.
The following post might perhaps be of interest.
http://forum.high-logic.com:9080/t/chronicle-text-font/668/8
William Overington
29 May 2012