Autodesk 15606-011408-9330 User Guide - Page 141

You can select map features in several different ways:
Use the mouse to select features.
Use one of the options on the Select menu. You can also combine multiple selection techniques.  For step-by-step instructions, choose Help Contents, click the Index tab, and look up "selecting map features."    Note If a map includes multiple selectable polygon layers, some selection tech- niques (such as Select Radius, Select Polygon, Select Within, and using the mouse to drag a rectangle around map features) will select features from all selectable layers. When selected features on different layers overlap one another, the selection color for each layer varies depending on how many features overlap. Portions of unselected map features also change color if a feature in a layer beneath them is selected. These color changes differentiate the different layers. Creating Buffers Around Map Features Help Index buffers A common GIS spatial query involves finding all features within a specified distance, or a buffer, of one or more other features. A buffer is a polygon that defines its boundaries at a specified distance from a point, line, or another polygon. For example, you could locate all customers within one mile of a number of store locations. As part of this query, you might also want to see the area that defines the spatial query. Autodesk MapGuide Author can create buffer zones around one or more selected features. You can then select features that fall within these buffers.  You use the View Buffer command to create buffers.  For step-by-step instructions, choose Help Contents, click the Index tab, and look up "buffers." Creating Buffers Around Map Features | 141