OpenType features in this family

• caltArrow ligatures4 substitutions · contextuala -> b <= ca -> b <= cUse in sampler
• ss01Mode: capitals and cards swap236 substitutionsMode Shift 02Mode Shift 02Use in sampler
• ss02Plain segment readings of A B D K Q10 substitutionsBAD KID QUADBAD KID QUADUse in sampler
• ss03Blink off phase for colon and point2 substitutions.:.:Use in sampler
• tnumTabular8 substitutions1:11.11:11.1Use in sampler
• zeroSlashed zero1 substitution0 O 20260 O 2026Use in sampler

Left: feature off. Right: on. Substitutions read from the font's GSUB table.

Known limitations

• S and 5 (and O and 0) share one segment set; they are told apart by context, as in every segment display. B, D, K, A, Q have a hybrid default and a plain ss02 reading; the plain B and D are still easy to confuse with 8, 0 and 3.
• The lens slit is 7 units wide (6 in Bold) and turns to a grey hairline below about 30 px; use Text under 24 px. Flap and the Segment lowercase keep the hairline slit and hinge notches at every size, so they are noisy below about 32 px.
• Segment Bold is heavy: at 118-unit bars the 22-unit gaps close up and the hexagon tips blob below about 40 px. It is a layer and display cut, not a text weight.
• Segment, Bold and Flap are not mono: all letters, figures and most symbols share a 600-unit cell, but brackets, quotes, dots and the like are narrower (tnum makes the dots cell width). fontbakery's monospace heuristic fires on this; it is waived.
• Text lowercase is a separate drawing (x-height 520, ascenders and descenders from segment strokes), not the flap-card forms; l, I, 1 and | are close, w is a zig-zag, a and g are the weakest letters. It is dense and loud at 14 px.
• The Ghost layer is empty under lowercase cards, arrows, geometric symbols and instrument glyphs (unlit segments make no sense there), and its diagonals (j k l m, V) add noise: keep it at 8 to 14 percent of the ink.
• Flap loses case on its own: A and a are the same card. Only ss01 and the text itself carry the case.
• Kerning (Text only) is computed from outline profiles and class based on the base letter (accented forms share their base's class); it is not tuned pair by pair. Segment and Mono cuts have no kerning by design.
• Marks: accents are drawn as small segments at fixed heights over a base; ď ť ľ Ľ use a tick placed 80 units inside the right edge; no stacked Vietnamese marks, no Latin Extended-B beyond dotless j; mark attachment points are the glyph centres.
• Text Mono omits IJ ij ʼn (they need two cells); its em and en spaces are one cell wide.
• Box drawing and blocks are plain rectangles (not segments) and join only at line-height normal; there are no shades beyond three dot patterns.
• Unhinted (smart dropout via gasp only). 'Lumel' is the family name of the previous dot-matrix face; this version replaces it and no trademark clearance was done.

The designer's own list, copied unchanged from the font's hand-off manifest.

Coverage by Unicode block

• Basic Latin94 / 94
• Latin-1 Supplement94 / 95
• Latin Extended-A128 / 128
• Latin Extended-B1 / 208
• Spacing Modifier Letters8 / 80
• Combining Diacritical Marks13 / 112
• General Punctuation17 / 98
• Currency Symbols1 / 33
• Letterlike Symbols1 / 80
• Arrows13 / 112
• Mathematical Operators5 / 256
• Miscellaneous Technical3 / 256
• Box Drawing22 / 128
• Block Elements8 / 32
• Geometric Shapes10 / 96
• Private Use Area21