2013
Table Of Contents
- Contents
- Get Information
- The User Interface
- Start and Save Drawings
- Control the Drawing Views
- Organize Drawings and Layouts
- Create Single-View Drawings (Model Space)
- Create Multiple-View Drawing Layouts (Paper Space)
- Work with Layouts in a Project
- Create and Modify Objects
- Control the Properties of Objects
- Use Precision Tools
- Work with the User Coordinate System (UCS)
- Enter Coordinates to Specify Points
- Use Dynamic Input
- Snap to Locations on Objects (Object Snaps)
- Restrict Cursor Movement
- Combine or Offset Points and Coordinates
- Specify Distances
- Extract Geometric Information from Objects
- Use a Calculator
- Create Objects
- Select and Modify Objects
- Select Objects
- Correct Mistakes
- Erase Objects
- Cut, Copy, and Paste with the Clipboard
- Modify Objects
- Add Constraints to Geometry
- Define and Reference Blocks
- Work with 3D Models
- Create 3D Models
- Overview of 3D Modeling
- Create Solids and Surfaces from Lines and Curves
- Create Solids
- Create Surfaces
- Create Meshes
- Create Wireframe Models
- Add 3D Thickness to Objects
- Modify 3D Models
- Create Sections and Drawings from 3D Models
- Create 3D Models
- Annotate Drawings
- Work with Annotations
- Overview of Annotations
- Scale Annotations
- Overview of Scaling Annotations
- Set Annotation Scale
- Create Annotative Objects
- Display Annotative Objects
- Add and Modify Scale Representations
- Set Orientation for Annotations
- Hatches, Fills, and Wipeouts
- Notes and Labels
- Overview of Notes and Labels
- Create Text
- Create Leaders
- Use Fields in Text
- Work with Text Styles
- Change Text
- Check Spelling
- Format Multiline Text at the Command Prompt
- Tables
- Dimensions and Tolerances
- Understand Basic Concepts of Dimensioning
- Use Dimension Styles
- Set the Scale for Dimensions
- Create Dimensions
- Modify Existing Dimensions
- Add Geometric Tolerances
- Work with Annotations
- Plot and Publish Drawings
- Specify Settings for Plotting
- Save Plot Settings as Named Page Setups
- Reuse Named Page Setups
- Specify Page Setup Settings
- Select a Printer or Plotter for a Layout
- Select a Paper Size for a Layout
- Determine the Drawing Orientation of a Layout
- Set the Plot Area of a Layout
- Adjust the Plot Offset of a Layout
- Set the Plot Scale for a Layout
- Set the Lineweight Scale for a Layout
- Select a Plot Style Table for a Layout
- Set Shaded Viewport and Plot Options for a Layout
- Named Page Setups with Projects
- Print or Plot Drawings
- Overview of Plotting
- Use a Page Setup to Specify Plot Settings
- Select a Printer or Plotter
- Specify the Area to Plot
- Set Paper Size
- Position the Drawing on the Paper
- Control How Objects Are Plotted
- Preview a Plot
- Plot Files to Other Formats
- Publish Drawings
- Specify Settings for Plotting
- Share Data Between Files
- Reference Other Drawing Files
- Work with Data in Other Formats
- Import Other File Formats
- Attach PDF Files as Underlays
- Attach Raster Image Files
- Export Drawings to Other File Formats
- Use Drawings from Different Versions and Applications
- Collaborate with Others
- Render Drawings
- Draw 2D Isometric Views
- Add Lighting to Your Model
- Materials and Textures
- Render 3D Objects for Realism
- Glossary
- Index
To realize the maximum benefits of demand loading, you need to save the
referenced drawings with layer and spatial indexes. The performance benefits
of demand loading are most noticeable when you do one of the following:
Clip the xref with the program to display a small fraction of it. A spatial
index is saved in the externally referenced drawing.
Freeze several layers of the xref. The externally referenced drawing is saved
with a layer index.
If demand loading is turned on, and you have clipped xrefs that were saved
with spatial indexes, objects in the referenced drawing database that are
contained within the clip volume comprise the majority of the objects read
into the drawing. If the clip volume is modified, more objects are loaded as
required from the reference drawing. Similarly, if you have xrefs with many
layers frozen that were saved with layer indexes, only the objects on those
thawed layers are read into the current drawing. If those xref-dependent layers
are thawed, the program reads in that geometry from the reference drawing
as required.
When demand loading is turned on, the program places a lock on all reference
drawings so that it can read in any geometry it needs to on demand. Other
users can open those reference drawings, but they cannot save changes to
them. If you want other users to be able to modify an xref that is being demand
loaded into another drawing, use demand loading with the Copy option.
If you turn on demand loading with the Enable with Copy option, the program
makes a temporary copy of the referenced drawing and demand loads the
temporary file. You can then demand load the xref while allowing the original
reference drawing to be available for modification. When you turn off demand
loading, the program reads in the entire reference drawing regardless of layer
visibility or clip instances.
Layer and spatial indexes were added in AutoCAD Release 14 and AutoCAD
LT 97. If you externally reference a drawing saved in a release previous to this,
you do not see the same performance benefit as drawings saved with the
indexes. For maximum performance, use demand loading with referenced
drawings saved with layer and spatial indexes turned on in AutoCAD Release
14, AutoCAD LT 97, or more recent versions.
Work with Layer and Spatial Indexes
To receive the maximum benefit of demand loading, it is recommended that
you save any drawings that are used as xrefs with layer and spatial indexes.
Reference Other Drawing Files | 667