You can use the Graphic Display window to select features and elements in the Graphic Display window (for example, to print, create coordinate systems, construct new features, calculate dimensions, and so on).
You can select features in any of these five basic ways:
Selected features are indicated by the current highlight color. To deselect a selected (or highlighted) feature, click the selected feature once. To re-select it, click the feature again.
More:
Selecting Features Using the ID(s)
Selecting Features Using Meta-Character Matching