Text and formulas#

Fonts, wrapping, colored spans, inline formulas, and standalone formulas.

Text#

Font names and fallback#

Use installed system families or font files with ordered fallback for Latin and Chinese text across all three export backends.

1label = text(content="Signal 信号: fonts in priority order", font_family=font,2             font_size=13 pt, color="#087f8c")3page.add(label, target=page.top_left, offset=(9 mm, 34 mm))

label = text(content="Signal 信号: fonts in priority order", font_family=font,
             font_size=13 pt, color="#087f8c")
page.add(label, target=page.top_left, offset=(9 mm, 34 mm))

Rendered result: Font names and fallback

Source: font.lay.

Reproduce: laymesh validate examples/gallery/typography/font.lay; laymesh render examples/gallery/typography/font.lay -o font.png --dpi 150.

Observed CLI output: 有效：examples/gallery/typography/font.lay（120 × 80 mm，2 个顶层实例）; PNG 709 × 472 px at 150 DPI; warnings: none.

Width, wrapping, and alignment#

Place the same paragraph at two widths; centered line counts change with width.

1body = text(size=(45 mm, auto),content="One reusable sentence wraps at different widths.",2            font_family=font, font_size=10 pt, align=center,3            line_height=6 mm, color="#203864")4page.add(body, target=page.top_left, offset=(8 mm, 29 mm))5page.add(body,size=(57 mm, auto), target=page.top_left, offset=(61 mm, 29 mm))

body = text(size=(45 mm, auto),content="One reusable sentence wraps at different widths.",
            font_family=font, font_size=10 pt, align=center,
            line_height=6 mm, color="#203864")
page.add(body, target=page.top_left, offset=(8 mm, 29 mm))
page.add(body,size=(57 mm, auto), target=page.top_left, offset=(61 mm, 29 mm))

Rendered result: Width, wrapping, and alignment

Source: wrap-align.lay.

Reproduce: laymesh validate examples/gallery/typography/wrap-align.lay; laymesh render examples/gallery/typography/wrap-align.lay -o wrap-align.png --dpi 150.

Observed CLI output: 有效：examples/gallery/typography/wrap-align.lay（120 × 80 mm，3 个顶层实例）; PNG 709 × 472 px at 150 DPI; warnings: none.

Colored text spans#

Override color and size separately for spans in one line.

1rich = text(spans=[2  span("COLOR", color="#087f8c", font_size=16 pt),3  span(" IN ", color="#203864", font_size=12 pt),4  span("ONE LINE", color="#e67563", font_size=16 pt)5], font_family=font, font_size=12 pt)6page.add(rich, target=page.top_left, offset=(12 mm, 35 mm))

rich = text(spans=[
  span("COLOR", color="#087f8c", font_size=16 pt),
  span(" IN ", color="#203864", font_size=12 pt),
  span("ONE LINE", color="#e67563", font_size=16 pt)
], font_family=font, font_size=12 pt)
page.add(rich, target=page.top_left, offset=(12 mm, 35 mm))

Rendered result: Colored text spans

Source: spans.lay.

Reproduce: laymesh validate examples/gallery/typography/spans.lay; laymesh render examples/gallery/typography/spans.lay -o spans.png --dpi 150.

Observed CLI output: 有效：examples/gallery/typography/spans.lay（120 × 80 mm，2 个顶层实例）; PNG 709 × 472 px at 150 DPI; warnings: none.

Formulas#

Inline formula#

Put a formula span on the same line as ordinary text.

1sentence = text(size=(98 mm, auto),spans=[2  span("Energy: ", color="#203864"),3  formula(source=r"E=mc^2", font_size=17 pt),4  span("  in one line", color="#087f8c")5], font_family=font, font_size=11 pt)6page.add(sentence, target=page.top_left, offset=(10 mm, 34 mm))

sentence = text(size=(98 mm, auto),spans=[
  span("Energy: ", color="#203864"),
  formula(source=r"E=mc^2", font_size=17 pt),
  span("  in one line", color="#087f8c")
], font_family=font, font_size=11 pt)
page.add(sentence, target=page.top_left, offset=(10 mm, 34 mm))

Rendered result: Inline formula

Source: inline-formula.lay.

Reproduce: laymesh validate examples/gallery/typography/inline-formula.lay; laymesh render examples/gallery/typography/inline-formula.lay -o inline-formula.png --dpi 150.

Observed CLI output: 有效：examples/gallery/typography/inline-formula.lay（120 × 80 mm，2 个顶层实例）; PNG 709 × 472 px at 150 DPI; warnings: none.

Display formula#

Center a standalone formula; the PDF retains its original LaTeX source.

1equation = formula(source=r"\int_0^1 x^2\,dx=\frac{1}{3}",2                   font_size=22 pt, style=display)3page.add(equation, anchor=center, target=page.center)

equation = formula(source=r"\int_0^1 x^2\,dx=\frac{1}{3}",
                   font_size=22 pt, style=display)
page.add(equation, anchor=center, target=page.center)

Rendered result: Display formula

Source: display-formula.lay.

Reproduce: laymesh validate examples/gallery/typography/display-formula.lay; laymesh render examples/gallery/typography/display-formula.lay -o display-formula.png --dpi 150.

Observed CLI output: 有效：examples/gallery/typography/display-formula.lay（120 × 80 mm，2 个顶层实例）; PNG 709 × 472 px at 150 DPI; warnings: none.