Autodesk 15606-011408-9320 User Guide - Page 163

Online Help Index themes creating Creating Themes You can create themes that allow users to quickly see and understand data on your map. For example, a typical theme for a point layer could display retail store locations with a different symbol for each type of store. A polygon layer theme could display each land use classification with a different color or shading. Note You cannot apply themes to text or buffer layers. Use the Theme area in the Styles tab in the Map Layer Properties dialog box to create or change a display theme for the features on the current map layer. Online Help Index labels for features Theme area in the Styles tab of the Map Layer Properties dialog box Before you can create a theme, you need to link the layer to a database. For more information, see "Specifying Data Source Properties for Layers" on page 153.  For step-by-step instructions, choose Help Contents, click the Index tab, and look up "themes, creating." Specifying Layer Feature Labeling and Overposting Use the Labels And Overposting area in the Styles tab of the Map Layer Properties dialog box to specify the font, size, color, and map display range of automatic labeling for this style set, and to control how features overlap on a layer. Labels And Overposting area in the Styles tab of the Map Layer Properties dialog box Overposting occurs when feature labels overlap or cover other map features. To minimize overposting, the default setting prevents a label from being drawn at a specific zoom level if it will obscure other labels or features on the map. However, the program will display the label when you zoom in far enough to allow sufficient space to display it. The source of the map feature label is the name field of the data source for the layer. Note that you cannot  create labels for buffer layers. For step-by-step instructions, choose Help Contents, click the Index tab, and look up "labels for features." Setting Style Properties for Layers | 163