Free original lessons
Plan a signboard on a grid, space letters by x-height, and construct a post with brackets using measured, checkable steps.
This lesson teaches a repeatable method for drawing a signboard: set a panel grid, place lettering with consistent x-height and spacing, then draw a post and bracket assembly that matches the panel. You will use a simple convention: x-height runs from the baseline to the midline of each capital letter, while cap height runs from baseline to top line. Letter styles vary, so the rubric rewards consistent proportions and clear spacing rather than one exact alphabet. All measurements are hypothetical examples; measure your own paper and tools before drawing.
Practice materials: Printable downloads are not available for this lesson yet. Use the instructions and four exercises below.
Draw a rectangular panel and divide it with light construction lines. Mark a top margin, a cap-height band, an x-height midline, a baseline, and a bottom margin. For a hypothetical 120 mm wide by 60 mm tall panel, use a 10 mm margin on all sides, leaving a 100 mm by 40 mm live area. Place the baseline 12 mm above the bottom edge and the cap line 28 mm above the baseline, giving a 28 mm cap height. The x-height midline sits halfway between baseline and cap line, so 14 mm above the baseline.
Lettering placement starts with a center line and a spacing guide. Draw vertical tick marks at equal intervals along the baseline to represent letter slots, then adjust by eye so wide letters such as M and W get more room than narrow letters such as I and L. Keep all capitals sitting on the baseline and touching the cap line; lowercase letters sit on the baseline and reach the x-height midline unless they have ascenders or descenders.
Use x-height as the reference for lowercase spacing. If x-height is 14 mm, aim for gaps between lowercase letters of roughly 3 to 5 mm, then adjust optically: round letters such as O and C need slightly less gap than straight letters such as H and N because their curves create visual air. For capitals, keep a consistent gap of about one quarter of the cap height, so a 28 mm cap height suggests a 7 mm gap as a starting point. These numbers are hypothetical examples, not standards.
Check spacing by squinting or viewing the panel from a few steps back. The gaps should look like a steady rhythm, not a series of accidental clumps. If a word looks tight, widen the gaps on both sides of the tight pair rather than only one side. Keep letter heights consistent: every capital touches the cap line and baseline, and every lowercase x-height letter touches the midline and baseline.
Draw the post as two vertical lines centered under the panel. For a hypothetical panel 120 mm wide, make the post 20 mm wide and extend it 80 mm below the panel bottom. Add a ground line and a simple base plate 40 mm wide and 8 mm tall. The post should be centered so the panel overhangs equally on both sides; check by measuring from each panel edge to the post center line.
Connect the panel to the post with two brackets. Draw each bracket as a right triangle or an L-shaped plate, one near the top of the panel and one near the bottom. For the hypothetical example, place the upper bracket 10 mm below the panel top and the lower bracket 10 mm above the panel bottom. Each bracket should touch the post and the panel back, with visible fasteners drawn as small circles. Label the post width, bracket spacing, and base plate dimensions so the construction can be checked.
Complete the sign by adding a thin border inside the panel margin, keeping it 2 mm inside the live area. Do not add logos or decorative symbols that would confuse the lettering check. Erase construction lines gently, then inspect the drawing under good light. Confirm that the lettering sits on the baseline, the x-height midline is consistent, and the post is centered under the panel.
Use a simple arithmetic check: panel width minus post width, divided by two, gives the overhang on each side. For the hypothetical 120 mm panel and 20 mm post, the overhang is 50 mm on each side. If your measured overhangs differ by more than 2 mm, shift the post and redraw the brackets. Record your actual paper size and ruler measurements rather than assuming the hypothetical values apply.
A sign panel is 100 mm wide and 50 mm tall. Use a 10 mm margin, a 24 mm cap height, and a 12 mm x-height. A centered post is 16 mm wide. Find the live area width, the left overhang, and state where the x-height midline sits above the baseline.
Live area width is 100 minus 20 equals 80 mm. Left overhang is (100 minus 16) divided by 2 equals 42 mm. The x-height midline is 12 mm above the baseline.
Why: Margins remove 10 mm from each side, so the live area is 80 mm wide. The post is centered, so each side overhang is half of the panel width minus post width. The x-height midline is defined directly as 12 mm above the baseline.
Check: Add the two overhangs and the post width: 42 plus 16 plus 42 equals 100 mm, matching the panel width. Confirm the midline is below the 24 mm cap line.
A panel is 90 mm wide with 8 mm margins on each side. What is the live area width?
74 mm.
Why: Subtract both margins from the panel width: 90 minus 8 minus 8 equals 74 mm.
Check: Add the live area and both margins: 74 plus 8 plus 8 equals 90 mm.
A centered post is 14 mm wide under a 110 mm panel. What is each side overhang?
48 mm.
Why: Panel width minus post width is 110 minus 14 equals 96 mm; half of that is 48 mm per side.
Check: 48 plus 14 plus 48 equals 110 mm.
Cap height is 30 mm and x-height is 15 mm. Where is the x-height midline above the baseline, and how far below the cap line is it?
The midline is 15 mm above the baseline and 15 mm below the cap line.
Why: X-height is given as 15 mm above baseline. Cap height minus x-height is 30 minus 15 equals 15 mm below the cap line.
Check: 15 mm above baseline plus 15 mm to cap line equals 30 mm cap height.
A panel is 80 mm tall. The upper bracket is 10 mm below the top and the lower bracket is 10 mm above the bottom. What is the vertical distance between bracket centers if each bracket is 6 mm tall?
54 mm between bracket centers.
Why: Upper bracket center is 10 plus 3 equals 13 mm below the top. Lower bracket center is 10 plus 3 equals 13 mm above the bottom. Distance between centers is 80 minus 13 minus 13 equals 54 mm.
Check: 13 mm from top to upper center plus 54 mm between centers plus 13 mm from lower center to bottom equals 80 mm.
X-height is the distance from the baseline to the midline of lowercase letters such as a, c, e, and o. Cap height is baseline to top line. Letter styles vary, so use the midline as your consistent reference.
No. The 120 mm panel and 20 mm post are examples only. Measure your own paper and choose values that fit, then label them on your drawing.
Compare several gaps with a ruler and view the panel from a few steps back. Aim for a steady rhythm, allowing slightly tighter gaps around round letters.
Yes. The rubric checks consistent height, baseline contact, and even spacing, not one exact alphabet. Keep your chosen style consistent across the sign.