⌂ How to bottom-align texts with different vertical extents

Some letters imply smaller vertical extents than the others; if you have, below your staff, two markups with different vertical extents (e.g. one text with letters t,h,l and/or UPPER CASE and one text with a, c, e, n or m), LilyPond will align them to the top by default, thus making it look a bit messy. Therefore, you need to add invisible ascender letters using the \transparent command to make it right.