Multiline Text (MTEXT)
AutoCAD's rich-text annotation object supporting paragraph formatting, columns, stacking, and embedded fields.
Definition & Context
MTEXT is AutoCAD's paragraph-text object, created with the MTEXT command. Unlike single-line TEXT it supports word-wrap within a set width, mixed formatting (bold, font, color, height) inside one object, bullet/numbered lists, columns, and stacked fractions/tolerances.
MTEXT can embed Fields (sheet number, date, object properties) that update automatically, honors text styles, and supports annotative scaling. The in-place editor offers ribbon formatting, and a background mask improves legibility over busy geometry.
Why It Matters
MTEXT is the right tool for notes and specifications: one object holds a formatted block that reflows when edited, instead of many loose TEXT lines to realign by hand.
Fields inside MTEXT keep title-block and reference text in sync with the drawing, cutting transcription errors.
Best Practices
- Use MTEXT (not stacked TEXT lines) for notes so text reflows when edited
- Drive repeating values (sheet no., date, revisions) with Fields instead of typing them
- Use annotative text styles so notes plot at a constant height across scales
- Apply a background mask sparingly for legibility over hatching/geometry
Common Pitfalls
- Hard line breaks instead of letting text wrap, so edits misalign
- Overriding formatting inline instead of via a text style, creating inconsistency
- Exploding MTEXT (losing formatting and fields) just to make small edits
Standard Engineering Workflow for Multiline Text (MTEXT)
2. Geometric Alignment & Profile Design
Lay out horizontal tangents and spiral transitions following AASHTO / Eurocode minimum curve radii, coupled with vertical slope crest/sag parabolic curves.
Common Failure Scenarios & Troubleshooting
| Failure / Geometric Issue | Root Cause & Mitigation Strategy |
|---|---|
| Surface triangulation bridges across steep ravines incorrectly | Add linear Breaklines along tops/toes of slopes or specify 'Maximum Triangle Length' under Surface Build Properties. |
| Horizontal curve radius triggers AASHTO violation flags | Adjust minimum transition spiral length or increase curve radius to meet minimum design speed superelevation criteria. |
| Coordinates offset by several meters after CAD/GIS import | Verify projection datum and false easting/northing parameters in MAPCSASSIGN before importing geospatial shapefiles. |
Industry Standards & Compliance Codes
- Eurocode 7 (Geotechnical Design - EN 1997)
- ISO 19650 (BIM for Civil Infrastructure)
References & Further Reading
Related Concepts
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