Smart Dimension (SOLIDWORKS)
The unified dimensioning command that infers the dimension type from selected entities and the cursor position.
🔗 Related Concepts
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Definition
The Smart Dimension command (D) handles linear, angular, radial, diameter, ordinate, and chamfer dimensions from one tool — context-sensitive. In sketches, Smart Dimension also drives the underlying parametric relationship; entered values change the geometry.
Why it matters
Sketch dimensions are the parametric handles for the entire feature tree. Disciplined dimensioning (fully define every sketch, name important dimensions for global use) is the foundation of maintainable parts.
Common pitfalls
- Leaving sketches under-defined — features rebuild but geometry shifts unpredictably.
- Over-defining sketches — produces conflicting-dimension warnings.
- Naming sketches by default 'Sketch1' instead of by intent — equations and configurations become unreadable.
Driving vs. driven dimensions
The Smart Dimension tool infers the dimension type from what you select (linear, radial, angular, arc-length). In a sketch these are driving dimensions: changing the value moves the geometry, and a fully-dimensioned sketch turns black (fully defined). In drawings, dimensions are driven by the model by default; a driven dimension (shown in grey/parentheses) reports geometry but cannot change it.
Productivity options worth knowing
Enable rapid dimension to place dimensions on a snapping ring without cursor jitter, and use DimXpert to auto-apply a tolerance-aware dimension scheme for MBD. Tab-cycle witness-line attach points, and type equations directly into the modify box (e.g. ="Length"/2) to link a dimension to a global variable.
References
Primary and vendor documentation used while writing this page (external links, not republished):
SOLIDWORKS Ecosystem Context
This concept is a core structural element of the SOLIDWORKS drafting and engineering environment developed by Dassault Systèmes. Dassault Systèmes' mainstream parametric MCAD — feature-based modelling, assembly mates, and 2D drawings tightly coupled to the 3D model.
Relevant SOLIDWORKS FAQs
❓ Is SOLIDWORKS available on macOS?
Not natively. SOLIDWORKS is Windows-only. Mac users run it via Parallels, VMware Fusion, or Boot Camp (Intel Macs). On Apple Silicon, virtualisation is limited. The official cross-platform alternative from Dassault is the browser-based xDesign on 3DEXPERIENCE.
❓ What's the difference between SOLIDWORKS Standard, Professional, and Premium?
Standard is the core modelling + drawings package. Professional adds CAD Library, PhotoView 360 rendering, eDrawings Professional, Toolbox, advanced sheet metal. Premium adds Simulation, Routing (electrical/piping), ScanTo3D, Motion. Most production shops use Premium; education usually uses Premium-equivalent.
❓ What is 3DEXPERIENCE SOLIDWORKS vs. traditional SOLIDWORKS?
Traditional SOLIDWORKS is a desktop product, files saved to disk/network/PDM. 3DEXPERIENCE SOLIDWORKS is the same desktop product but cloud-connected: files saved to the 3DEXPERIENCE platform, license tied to a Platform identity, and access to companion cloud apps (3D Sculptor / xDesign, simulation, PLM).
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🎓 Recommended Practice Lessons
Step-by-step practical exercises and certification-aligned paths chosen by our editors to master this concept:
SOLIDWORKS - Tutorial for Beginners in 13 MINUTES!
SOLIDWORKS 3D CAD Specialization (Coursera)
🌳 Semantic Crossroads & Navigation Pathways
Trunk-Branch-Leaf ModelExplore cross-referenced learning lanes. Connect this specific method back to macro CAD coordinate foundations, parent software environments, and sibling parameters in our shared taxonomy map.
Global Foundations
Core glossary, interactive graph, and domain-wide concept index.
Ecosystem Integration
Parent design environments and platforms implementing this method natively.
Active Context & Neighbors
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