CAD Basics
From WireCAD Online Help
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Introduction
What is CAD?
Vector Based
Limits
Coordinates
Drawing Spaces Explained
Viewports
Grid
Snap
Ortho
Polar
Object Snaps (OSnap)
Units DU
Printing
PDF
Basic Drawing Entities
Line
PolyLine
Circle
2pt Arc
3pt Arc
Point
Rectangle
Text
Multiline Text (MTEXT)
Image
Line
Compound Drawing Entities
Horizontal Dimension
Vertical Dimension
Aligned Dimension
Angled Dimension
Radius Dimension
Diameter Dimension
Leader Dimension
Collections
Layers
Layouts
Point Styles
Text Styles
Dimension Styles
Blocks
LineTypes
Layers