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Learning Goals
- Use the ACAD “Osap” tools to facilitate point
selection
- Use ACAD “Grips” to facilitate entity
modification
- Create and Use ACAD “Blocks”
- Create & Modify ACAD “Layers”
- Use Geometric Construction to Bisect a Line or
an Angle
Layers
- Probably the most important object property
to understand well is the LAYER property.
- Experienced AutoCAD users use layers all the
time
- that is why the Object Properties toolbar contains so many layer functions.
Layers ToolBar Properties ToolBar
Layer Utility
- Layers are effectively a way of ordering a
CAD drawing
- e.g.; You could create a layer called "Construction" and use this for your construction lines. When the drawing is complete, you could simply TURN OFF this layer off so that it can't be seen
- Good & Consistent use of layers is the
MOST Important aspect of good CAD
drawing practice
Layer Management
- Layers are Typically Defined Based on Some
Combination of these Criteria
- By Line-Type or Line-Usage
- By Part or Component
- By Material or Form; e.g.
- On a Construction dwg Layers might be defined by Materials: Steel, Wood, Concrete
- On a Piping Design Dwg Layers Defined by Fluid: ColdWater, HotWater, NatGas, Sewer
- On Landscape Design by main elements: Trees, Scrubs, Grass, FlowerBeds
Layers By Line-Type
One FUNCTIONAL Layer
Layers by Function
Several LineType Layers
Make A Layer
- Let’s Make a New Layer for HIDDEN LINES
- Color → Red
- LineType → Hidden (Evenly Spaced Dashes)
- LineWidth → ACAD default
- Start at new acad.dwt Drawing 2. Activate Format Layer Dialog Box
Make A Layer cont
- Click on the New Layer icon 5. Select Color
- Name the Layer as “Hidden” 6. Pick Red from DB
Make A Layer cont
- With Hidden Loaded, Pick it from Select Linetype DB 10. Rt-Click on Status Column and Select Current
Make A Layer cont
- Click OK on Last dialog Box
Draw a Pentagon with the Hidden Layer
Draw on Different Layer
- Start with “OBJ” layer
- Activate Layer PullDown on the Layers ToolBar
Click on the “DIM” Layer to make it the “ Current ” Layer
Draw on Different Layer CONT
- Layer-Status Window on Layers ToolBar Now shows “DIM” as current
The Heptagon will then Reside on the Current Layer “DIM
Draw a Nice Heptagon Next to the “OBJ” Layered Circle
Move Entity to Different Layer
- Lets Move the Circle to the “PHANTOM” Layer
- Click to Circle to activate the Grips
With the Handles Active PullDown the Layer-Status Menu Click on “PHANTOM”
Move Entity to Different Layer
- Deactivate the Grips by Hitting Esc key
