The Extend command lets you extend entities to a boundary, which is defined by one or more other entities.
If the Edge Mode setting (EDGEMODE ) is On , you can extend entities 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 Projection Mode setting (PROJMODE ) 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.
To extend entities
Do one of the following:
- Click the Extend tool button () on the Extend/Stretch flyout of Modify toolbar.
- Choose Extend in the Modify menu.
- Type extend or EX in the command bar, then press Enter.
You are prompted: Select boundary entities for extend <ENTER to select all>:
Select the boundary entities, then press Enter or right click.
You are prompted: Fence/Crossing/Edge mode/Projection/eRase/Undo/<Select entity to extend or shift-select to trim>:
A prompt menu displays.
Click the entity you want to extend near the end that can make the extension.
The entity is extended.
Press and hold the shift key to trim the entity.
Repeat step 3 to extend more entities.
Right click or press Enter to conclude the Extend command.