Autodesk 00308-011408-9F30A User Guide - Page 260

You can select entities using a variety of techniques. You can select them directly, using the mouse, you can select all of the entities in the drawing using a command, or you can use the Selection Modifier. The Selection Modifier allows you to select entities based on their properties. This is a very powerful capability. With it, you can select all of the entities on the Plumbing layer, all of the symbols that represent desks costing over five hundred dollars, or all of the entities in the drawing except red circles and green arcs. When you select an entity, it becomes part of the current selection set. The selection set consists of highlighted entities surrounded by selection handles. You can add entities to the selection set and remove them anytime you like. With each change, the selection handles are adjusted to reflect the extent of the current selection set. The selection set can contain any number of entities from a single entity to all entities in the drawing. Any action you perform on the selection set affects all selected entities. Selecting Entities with the Mouse Using the mouse is the simplest way to select an entity. With the mouse, you can select a single entity, cycle through overlapping entities, or select multiple entities at once. The edit bar displays the number of entities selected. s Simply click any individual entity to select it. s If entities overlap, you can use GetNext selection to cycle through the over- lapping entities by pressing ALT as you click. When you release the ALT key the highlighted entity is selected. s Clicking and dragging from left to right, allows you to select all entities that are completely inside the region. s Clicking and dragging from right to left, allows you to select even entities that are partially inside the region. s You can also select single or multiple entities by defining a special polyline, in which only entities that the polyline crosses are selected. 250 | Chapter 20 Selecting & Deleting Entities