Small text is where digitizers earn their reputation. Below about 5mm cap height, letters start to disappear into fabric — thin strokes fill in, counters (the holes inside letters like 'o' and 'a') close up, and serifs look like ink smudges. Getting readable text at 3–4mm requires deliberate choices at every step.
Font selection matters first. Sans-serifs with uniform stroke widths — think Helvetica, Arial, DIN — survive small sizes better than any serif or condensed font.
Second, use satin columns for every stroke you can. Fills below about 4mm start to look muddy; satin has more sheen and better edge definition.
Third, reduce underlay. On small letters, the underlay can be almost as big as the top stitch — it shows through as fuzz. A single center-walk underlay is often enough.
Fourth, tighten density. At small sizes, standard 0.4mm satin spacing looks loose. Bump to 0.35mm for cleaner coverage.
Fifth, respect the fabric. Fleece and pique will swallow small text no matter how good the digitizing is. If small text is critical, print or apply it to a smoother fabric.
Finally, accept the physics. 3mm text on textured knit will never look like 3mm text on a printed page. A good digitizer maximizes what's possible; only artwork adjustments can push further.