There are several posts and information around for changing the mode-line face properties, like size. I tried them for a smaller mode-line, using:
(set-face-attribute 'mode-line nil :height 100)
This works fine, but I've just realized that this also changes the top (header?) line that I use for
sticky-func-mode, which is unfortunate because it is smaller than my buffer face and disrupts the visual structure of the code.
How can I change the mode-line size without affecting the header line (I'm not sure how its called)?