mouse or keyboard is really just a preference. you could do mouse 1 sweep-select 2-3 in one window, and move to another mouse 1-3, and move to another do mouse 1-3, ... Or you could do, in case of vi, y$ (or other movements), ^w w (or other way to select other window), (move your cursor) p, ^w w, (move your cursor) p, ... Though I'm biased, because I feel it's much easier to move my mouse than do one of wWbBeE^$fFtThjkl to move my cursor, even though it is a lot faster and efficient to only move a few of my fingers than my whole arm.
the font is likely Go Font, the proportional one