Introduction to Layers (complete Lecture).ppt

In manual drafting, details
of a design are separated
by placing them on
different sheets.
This is called overlay or
pin drafting
 Each overlay is perfectly aligned
with the others.
 All of the layers can be
reproduced to reflect the entire
design.
 Individual layers may be
reproduced to show specific
details.

In AutoCAD, overlays are
called layers
The use of layers increases
productivity.
 Specific information can be
grouped by layer.
 Drawings can be reproduced by
layer or combined in any
sequence desired.
 Each layer can be assigned a
different color to improve clarity.

 Each layer can be plotted in a
different color or pen width.
 Selected layers can be turned on
or off, or frozen to decrease
information clutter.
 Changes can be made to a layer
promptly.

Mechanical drafting
The following may be
placed on separate layers:
 views
 hidden features
 dimensions
 sections
 notes
 symbols

Architectural Drafting
 Drawings usually contain over
100 layers
 Floor plan layer
 Foundation plan layer
 Partition layout layer
 Plumbing layer
 Electrical layer
 Structural layer
 Roof drainage layer
 HVAC systems layer

Introduction to Layers (complete Lecture).ppt

Interior Design Drafting
 floor plan layer
 interior partition layer
 furniture layer

Electronics Drafting
 Circuit boards have multiple
layers to conduct electricity to
different components.
 Each layer of a circuit board is
drawn on a different layer.

AutoCAD allows you to
select a linetype for each
layer.
 Any item drawn on that layer
would be assigned that linetype

AutoCAD uses Layer 0 as
the default layer
 It has a continuous linetype.
The ZERO layer or “0”
layer is a special layer.
The “0” layer should be
kept empty.
It is reserved for creating
BLOCKS.

 Create the layer FIRST.
 MOVE to that layer.
 THEN, draw objects on the new
layer.
 Do not draw objects on Layer 0.

Name Layers to reflect
what is on the layer.
Examples of good layer
names:
 1stFL_PLAN
 1stFL_ELECTRICAL
 1stFL_MECHANICAL

Name Layers to reflect
what is on the layer.
Examples of poor layer
names:
 LAYER1
 LAYER2
 LAYER3

Layer names can have up
to 31 characters
Layer names can include
 Letters.
 Numbers.
 Special characters.
Layer names cannot
include / | * ? ; or :

Access the LAYER
command by:
 1. Typing LA or LAYER at the
Command: prompt.
 OR
 2. Select the Layers button on
the Object Properties toolbar.
 OR
 3. Select Layer from the Format
pull-down menu.

The only layer present in a
new drawing is the 0
Layer.
Add Layers as needed.
To ADD a layer pick the
New button
 A new layer listing appears using
the default name of Layer 1.

 You can enter several new layers at
the same time.
 Entering several layer names at the
same time is faster than entering
them individually.

You can set a new current
layer by
 1. Highlighting the layer name in
the layer list
 Picking the Current: button.
OR
 2. Double-clicking on the layer.

The status of each layer is
displayed with icons to
the right of the layer
name.
ToolTips indicate what
each icon represents.
 Changing layer name.
 Turning layers on/off.
 Thawing/freezing layers.
 Thawing/freezing layers in
viewports.
 Unlocked and locked layers.
 Layer color.
 Layer linetype.

 Several layers can be selected at
once in the layer dialog box.
 Hold [Shift] to select layers
contiguously.
 Hold [Ctrl] to select multiple layers
individually, NOT contiguously.

Layers are coded by name
and number
 1 red
 2 yellow
 3 green
 4 cyan
 5 blue
 6 magenta
 7 white
Memorize these
numbers/colors.

Color settings affect the
appearance of plotted
drawings.
Plotter pen widths are
associated with drawing
color.
 Color = line width
 Color = pen weight
The colors you use must
correspond to the proper
pen widths.

Introduction to Layers (complete Lecture).ppt

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Introduction to Layers (complete Lecture).ppt