Translations:TechDraw Preferences/17/en
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- Standard and style: The standard to be used for dimensional values. The differences between the standards are shown in the image:

Differences between the supported standards. (Image source)
ISO oriented- drawn according to the standard ISO 129-1, text is rotated to be parallel with the dimension line tangent.ISO referencing- drawn in compliance with ISO 129-1, text is always horizontal, above the shortest possible reference line.ASME inlined- drawn according to the standard ASME Y14.5M, text is horizontal, inserted in a break within the dimension line or arc.ASME referencing- drawn in compliance with ASME Y14.5M, text is horizontal, short reference line is attached to one side's vertical center.
- Use global decimals: Use number of decimals from the general preferences.
- Show units: Appends the unit (mm, in, etc.) to dimension values.
- Alternate decimals: Number of decimals if Use Global Decimals is not selected and Dimension Format not specified.
- Dimension format: Custom format for dimension text. Uses the printf format specifier.
- Font size: Font size for dimension text.
- Tolerance text scale: Tolerance font size adjustment. Multiplier of dimension Font Size.
- Diameter symbol: Character used to indicate diameter dimensions.
- Arrow style: Arrowhead style for dimensions.
- Arrow size: Arrowhead size of dimensions.
- Extension gap factor - ISO: Gap between dimension point and start of extension lines for ISO dimensions. introduced in 0.21
- Extension gap factor - ASME: Gap between dimension point and start of extension lines for ASME dimensions. introduced in 0.21
- Line spacing - ISO: Spacing between the dimension line and dimension text for ISO dimensions. introduced in 0.21