Adjust the line height and the font ascent of the text object.
Values of -1 for each means that appropriate single-spaced values will be calculated automatically, based on the largest font in each line.
The line height specifies the distance, in pixels, between the top of one line and the top of the next, regardless of the font sizes used on that line.
The font ascent specifies the how far above the baseline (where the bottoms of characters line up) to start drawing the blinking caret or the selection highlighting.
Tip: leave the ascent at -1 and set the line height to 125% of the font size.
