19. The system of claim 16 wherein the one or more design tools are further configured to determine the total combined height of all text elements having specified text content and the one or more vertical spacing distances before determining a position for the text elements and, if the total combined height is greater than the height of the area, to iteratively reduce at least the text font size of at least some of the text elements, determine a new height of each text element having text content at the reduced font size, and determine anew total combined height until the total combined height is less than or equal to the available height of the area.
19. The system of claim 16 wherein the one or more design tools are further configured to determine the total combined height of all text elements having specified text content and the one or more vertical spacing distances before determining a position for the text elements and, if the total combined height is greater than the height of the area, to iteratively reduce at least the text font size of at least some of the text elements, determine a new height of each text element having text content at the reduced font size, and determine anew total combined height until the total combined height is less than or equal to the available height of the area. 20. The system of claim 19 wherein the one or more design tools are further configured to also iteratively reduce one or more of the vertical spacing distances when iteratively reducing at least the text font size.