Determine which layers are being used, lock layers that you do not want to modify and control which layers are displayed.
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User Interface
2207 - Becoming Familiar with the Interface
2209 - Zooming and Panning
2302 - Working with Multiple Windows and Tabbed Views
2306 - Working with Toolbars and Tool Buttons in Multiple Windows
2219 - Navigating in 3D
2222 - Understanding Display Options
2223 - Display Options in Home Designer
2212 - Toolbar Customization
2230 - Space Planning Assistant
2217 - File Management
2214 - Default Settings
2216 - Templates: Creating Your Own
2213 - Preferences
2211 - Becoming Familiar with the Library Browser