Extending entities

The EXTEND command extends entities to a boundary, which is defined by one or more other entities.

If the EDGEMODE system variable is On, entities extend to an implied edge of the boundary entities.

If the boundary entity is not in the same plane as the entity you want to extend, the PROJMODE system variable lets you choose how the intersection is to be calculated. The options are:

  • Project to the XY plane of the current UCS
  • Project to the current view plane
  • True 3D mode (No projection).

When extending entities, first select the boundary edges, and then specify the entities to extend, selecting them either one by one or using the fence selection method.

The following entities can be extended: arcs, lines, two-dimensional polylines, rays.

Boundary entities can be: arcs, circles, ellipses, lines, splines, polylines, rays, infinite lines, layout viewports.



Extending entities

  1. Launch the EXTEND command.

    You are prompted: Select boundary entities for extend [selection options (?)] <ENTER to select all>:

  2. Select a boundary entity.

    Entities in set: 1

    You are prompted: Select boundary entities for extend [selection options (?)] <ENTER to select all>:

  3. Select more boundary entities or press Enter to stop selecting.

    You are prompted: Select entity to extend or shift-select to trim or [Fence/Crossing/Edge mode/Projection/eRase]:

  4. Select an entity:

    The entity extends to the boundary entity.

    You are prompted: Select entity to extend or shift-select to trim or [Fence/Crossing/Edge mode/Projection/eRase/Undo]:

  5. Select more entities or press Enter to stop.
Note:
  • Entities which are selected when you launch the EXTEND command will be used as boundary entities.
  • Hold down the Shift key when you select an entity to trim the line by the boundary entity.
  • Use the Fence or Crossing selection method to select a series of entities simultaneously.
  • If you select an entity near the end that cannot make an extension to one of the boundary entities, the EXTEND command is aborted.