Learning to draw ALS lemon font marks and medium fonts means mastering two things: a stroke skeleton for the marks and calibrated weight for the letters around them. The lemon marks work best as accents at roughly 1.5× the x-height, while medium weights sit near 8 percent of cap height. You do not need talent first. You need a grid, a repeatable stroke order, and a habit of matching contrast before shape. This explainer covers the drawing mechanics behind both, the numbers that keep them consistent, and the edge cases that thin guides skip.
How lemon mark strokes are constructed
A lemon mark is a lens shape with pointed ends and a bulged middle, built from two mirrored arcs. Draw one shallow curve, mirror it along the horizontal axis, and join the tips. The shape reads as "lemon" because the curvature peaks near 55 to 60 percent of the length, not at the true midpoint.
Why that offset matters is a matter of how eyes track curvature. A symmetric lens looks like an eye or a leaf. A lens with slight forward-weighted curvature reads as citrus. Shift the peak about 5 percent toward one end and the mark gains character without breaking the grid.
Stroke order determines consistency. Draw the top arc left to right, then the bottom arc right to left, closing at the same two control points. This keeps the tips sharp and avoids the rounded blob that happens when you draw both arcs in one direction.
At small sizes, the lens collapses into a lozenge; below about 4 px of mark height, the curvature disappears. Draw the mark at large size, then reduce it. The vector outline survives reduction better than freehand strokes.
Plain language: build the lemon from two mirrored curves, not from one swoop, and keep the widest point slightly off-center.
The math of medium font weight
Medium weight is a bracket, not a single value. In most type families, medium sits between regular and semibold, with stroke width around 8 to 10 percent of cap height. Regular is nearer 6 percent; semibold climbs past 11 percent.
Translating that to hand-drawing: if your capital letter is 10 mm tall, the vertical stem should measure about 0.8 to 1.0 mm wide. Hold a fine-liner and measure the line it lays down, not the nib. A 0.5 mm nib already exceeds the target on a 4 mm x-height.
Weight interacts with contrast, which is the ratio of thick to thin strokes. A medium sans-serif keeps contrast near 1.2:1; a medium serif can reach 2:1. Draw the stems first at target width, then thin the horizontals by the same percentage across every letter.
The counterintuitive detail: medium weight is read as pressure, not size. A too-bold letter at small size looks cramped even if it fits the grid, because perceived weight depends on the ratio of ink to counter (the white space inside letters). Keep the counter at least 40 percent of the stem-adjacent area, or the letter fills in.
Plain language: pick one stem width for the whole alphabet and measure every other stroke as a percentage of it.
Matching marks to letters: the comparison table
| Element | Target size | Stroke width | Contrast ratio | Where it fails |
|---|---|---|---|---|
| Lemon mark (accent) | 1.5× x-height | 1.4× stem width | 1.1:1 | Below 4 px height |
| Medium lowercase | x-height | 1.0× stem (baseline) | 1.2:1 | Counter under 40 percent |
| Medium uppercase | cap height | 1.0× stem | 1.2:1 | Wide letters drift bold |
| Regular (reference) | x-height | 0.75× medium stem | 1.4:1 | Too thin at small size |
| Semibold (reference) | x-height | 1.3× medium stem | 1.1:1 | Counters close up |
| Lemon mark (inline) | 0.8× x-height | 0.9× stem | 1.2:1 | Loses point definition |
The table reconciles the two size thresholds you will see quoted. Some guides set the lemon mark at x-height; others at 1.5×. Use x-height for inline marks and 1.5× for standalone accents. Both are correct in their context, and the difference is whether the mark sits inside a line of text or above it.
A timeline for learning the stroke set
Skill acquisition follows a predictable curve. The table below reflects general motor-learning progression, not a fixed schedule; individual pace varies.
| Stage | Time frame | What you practice | What improves |
|---|---|---|---|
| Skeleton | Days 1–3 | Straight stems, circles, lens outline | Line control |
| Weight | Days 4–7 | Fixed stem width across alphabet | Consistency |
| Contrast | Days 8–14 | Thick/thin ratios per letter | Letterform accuracy |
| Lemon marks | Days 15–21 | Mirrored arcs, tip sharpening | Accent precision |
| Integration | Days 22–30 | Marks placed with text | Spacing judgment |
| Refinement | Beyond day 30 | Redrawing from memory | Speed and fluency |
Deliberate practice beats repetition. Twenty focused minutes with a measured stem width produces more gain than an hour of free sketching, because the feedback loop is tighter.
Edge cases and red flags
Most beginner failures are predictable and correctable.
Stems drift wider as the hand tires; measure the last letter against the first. Lemon tips round off because the pen slows at the end of the arc; accelerate through the tip. Counters fill in when contrast is pushed too far for the size. Optical size mismatch: a mark drawn at 1.5× looks oversized next to lowercase because x-height letters have more white space around them. Grid misalignment: marks placed by eye drift off the baseline; snap them to the guide. Over-thinning horizontals in a medium weight makes the letter read as regular.
The optical size point is the professional caveat. Typographers adjust weight per size because small text needs slightly wider stems to survive printing and screen rendering. Draw your medium weight a touch heavier for small use, lighter for display.
Misconceptions about lemon marks and medium fonts
Misconception one: the lemon mark is decorative and needs no grid. In fact, it is the most grid-sensitive element, because its two tips must align to the same horizontal.
Misconception two: medium is halfway between regular and bold. It is not. The jump from regular to medium is smaller than from medium to bold, and many families place medium closer to regular.
Misconception three: stroke width is constant across a font. It is not; contrast varies by letter, and the "medium" label describes the overall feel, not every stroke.
Misconception four: you can trace your way to fluency. Tracing builds shape memory but not measurement skill; measure, then compare.
Plain language: the label on a font describes an average, and your job is to hit that average letter by letter.
Practical actions to build the skill
Start with a measured grid. Draw a 10 mm baseline grid with x-height at 5 mm and cap height at 7 mm. That gives you a reference for every stem.
Set a stem standard before drawing letters. Choose 0.8 mm for a 7 mm cap height, then check the first and last letter of every line with a ruler.
Draw the lemon mark 20 times at large size, peaking curvature at 55 to 60 percent. Then reduce it to inline size and redraw from memory.
Practice weight in blocks. Draw five letters at the target stem width, cover them, redraw, and compare. Differences above 10 percent signal drift.
Test the pair. Place one lemon mark next to a row of medium letters and step back 12 inches. If the mark dominates, reduce it to x-height; if it disappears, raise contrast.
Track time, not output. Log 15 to 20 minutes daily for 30 days, and log which letter fails most often. That letter reveals your weak motor pattern.
Limits of this method
Drawing and typography guides describe tendencies, not universal laws. Stroke-width ratios shift between type families, and what reads as medium in one design reads as regular in another. Screen rendering, print resolution, and viewing distance change apparent weight more than most tutorials admit.
The timeline above reflects general motor-learning patterns, not measured outcomes from a controlled study. Treat the numbers as starting points to calibrate against your own work, and revise them as you compare results.