FontSize extension

Adjust text size for emphasis and readability.

Select text and apply different sizes. Supports pt, px, em, and rem units with automatic min/max clamping.

OOXML Structure

<w:r>
  <w:rPr>
    <w:sz w:val="28"/> <!-- Half-points: 14pt = 28 -->
  </w:rPr>
  <w:t>14pt text</w:t>
</w:r>

Use case

• Visual hierarchy - Different sizes for headers, body, and footnotes
• Emphasis - Larger text draws attention without bold
• Readability - Adjust size for screen distance and user preference
• Professional documents - Match specific formatting requirements

Options

Configure the extension behavior:

types · Array<string> · default: "['textStyle','tableCell']"

Node/mark types to add font size support to

defaults · FontSizeDefaults

Default size configuration

Attributes

Node attributes that can be set and retrieved:

fontSize · FontSizeValue

Font size with unit

Commands

setFontSize

Set font size

Automatically clamps to min/max values

Example:

Usage

editor.commands.setFontSize('14pt')
editor.commands.setFontSize('18px')
editor.commands.setFontSize(16)

Parameters:

fontSize · FontSizeValue · required

Size to apply (with optional unit)

unsetFontSize

Remove font size

Reverts to default document size

Example:

Usage

editor.commands.unsetFontSize()

Types

FontSizeDefaults

Font size configuration

Show Properties

value · number

Default font size value

unit · string

Default unit (pt, px, em, rem)

min · number

Minimum allowed size

max · number

Maximum allowed size

FontSizeValue

Size with optional unit (e.g., ‘12pt’, ‘16px’, 14)

Source code