Extending entities    

You can extend entities so that they end at a boundary defined by other entities. You can also extend entities to the point at which they would intersect an implied bound­ary edge. When extending entities, you first select the boundary edges, and then you specify the entities to extend, selecting them either one at a time, using the fence selection method, or the projection selection method.    

You can extend arcs, lines, two- and three-dimensional polylines, and rays. Arcs, cir­cles, ellipses, lines, splines, polylines, rays, infinite lines, and layout viewports can act as boundary edges.

If you extend a wide polyline, its centerline intersects the boundary edge. Because the end of the polyline is always cut at a 90-degree angle, part of the polyline may extend past the boundary edge. A tapered polyline continues to taper until it intersects the boundary edge. If this would result in a negative polyline width, the ending width changes to 0.      

To extend an entity

   1   Do one of the following to choose Extend ():

•    Select Extend from the ribbon or the menu.

•    On the Modify toolbar, click the Extend tool.

•    Type extend and then press Enter.

   2   Select one or more entities that you want to use as boundary edges, and then press Enter. This step is required only if mOde in the next prompt is set to Standard; if set to Quick, all entities are automatically considered as boundary edges.

   3   Select the entity to extend.

    4    Select another entity to extend, or press Enter to complete the command.

To extend an entity to an implied boundary edge    

   1   Do one of the following to choose Extend ():

•    Select Extend from the ribbon or the menu.

•    On the Modify toolbar, click the Extend tool.

•    Type extend and then press Enter.

   2   Select one or more entities that you want to use as boundary edges, and then press Enter. This step is required only if mOde in the next prompt is set to Standard; if set to Quick, all entities are automatically considered as boundary edges.

   3   Choose Edge Mode.

   4   Choose Extend.

   5   Select the entity to extend.

   6   Select another entity to extend, or press Enter to complete the command.

To extend several entities using the fence selection method    

   1   Do one of the following to choose Extend ():

•    Select Extend from the ribbon or the menu.

•    On the Modify toolbar, click the Extend tool.

•    Type extend and then press Enter.

   2   Select one or more entities that you want to use as boundary edges, and then press Enter. This step is required only if mOde in the next prompt is set to Standard; if set to Quick, all entities are automatically considered as boundary edges.

   3   Choose Fence.

   4   Specify the first point of the fence.

   5   Specify the second point of the fence.

    6    Specify the next fence point, or press Enter to complete the command.

To extend several entities using projection

   1   Do one of the following to choose Extend ():

•    Select Extend from the ribbon or the menu.

•    On the Modify toolbar, click the Extend tool.

•    Type extend and then press Enter.

   2   Select one or more entities that you want to use as boundary edges, and then press Enter. This step is required only if mOde in the next prompt is set to Standard; if set to Quick, all entities are automatically considered as boundary edges.

   3   Choose Projection, and then choose one of the following:

•    None Extends only the entities that intersect with the boundary edge in three dimensions.

•    UCS Extends entities that intersect with the projection of the boundary edge onto the XY plane of the current UCS and not those that intersect with the boundary edge in three dimensions.

•    View Extends entities that intersect with the projection of the boundary edge along the current view direction.

   4   Select the entity to extend.

   5   Select another entity to extend, or press Enter to complete the command.