Preload a mark, tap a segment (the mark, or the letters before / after it), then drag to kern — left–right and up–down, scale by percent, change the arm thickness of the K / X / Y, give the arms a black border — or select the letters and set their outline weight (Border px, starts at 3.2). When it looks right, Send to Crafteee — your numbers become the canonical values.
Tip: tap a part of the mark to select it, then drag it. Or use the buttons below.