alignment of glyphs at y>zero

Hi,

I have defined a TTF-Font. Now some of the glyphs in the font are not using zero on the y-axis as a baseline, but instead let's say y:150. When two glyphs are now being displayed on the monitor, it occurs that both do not always sit on the same baseline (which is different than y:0). This very much depends on the zoom factor of the application and the point size I am using for display, of course. Most of the time its ok, but in some views it is not.

Now, I wish to achieve to be able to have these sets of glyph to perfectly align at the bottom always. I've read through the alignment and hinting section of the user manual, but did not see how to best approach this problem.

Attached is an image, which better describes the problem. Top left&right show two characters which both sit exactly one pixel away from the zero axis at 19 Pt. The lower left and right show: the same characters (using the same coordinate points for the lower end) being displayed one pixel and two pixel away from y = zero. I want them to align on the bottom always. Is there a global option to do this?

I am using Fontlab Studio 5.0.2.

Thanks