About the Extend User Interface
The Extend user interface consists of commands, tabs, and shortcut menus. To access the Extend tool, click > 
Extend.
Extend.Commands
Use the Extend commands to define the type of wall extension:
• 
Along Original Surface—Extends the wall from the selected edge by a specified value.
Along Original Surface—Extends the wall from the selected edge by a specified value.Extend by value box, click 
to reverse the direction of the wall extension to the other side of the reference.
to reverse the direction of the wall extension to the other side of the reference.• 
Up to Intersecting—Extends the wall from the selected edge to intersect a surface or a reference plane.
Up to Intersecting—Extends the wall from the selected edge to intersect a surface or a reference plane.Plane collector.
• Up to Plane—Extends the wall from the selected edge up to a planar surface or a reference plane, remaining parallel to the selected edge.
Up to Plane—Extends the wall from the selected edge up to a planar surface or a reference plane, remaining parallel to the selected edge.Plane collector.
Tabs
• References—Displays the selected edge or surface reference in the collector.
• Extension—Controls the start and end sides of the wall extension.
◦ Normal to Extended Edge—Extends the wall normal to the referenced edge.
◦ Along Boundary Edge—Extends the wall along the boundary edge.
Extend surface adjacent to edge—Extends the surface adjacent to the boundary edge.
• Properties—Displays detailed feature information:
◦ Name—Shows a default name for the wall.
◦ 
—Shows feature information in a browser.
—Shows feature information in a browser.Shortcut Menus
Right-click the graphics window to access the shortcut commands:
• Clear—Removes the reference from the active collector.
• Wall Edge—Activates the wall edge collector.
Types of wall extension:
• Extend by Value—Extends the wall by a specified value.
• Flip—Reverses the direction of the wall extension to the other side of the reference, when Extend by Value is selected.
• Extend Through Until—Extends the wall from the selected edge up to a planar surface or a reference plane.
• Extend to Selected—Extends the wall from the selected edge to intersect a surface or a reference plane.
• Reference Plane—Activates the reference plane collector. Available when Extend Through Until or Extend to Selected is selected.
Right-click the Extension handle to access the shortcut commands:
• Normal to Extended Edge—Extends the wall normal to the referenced edge.
• Along Boundary Edge—Extends the wall along the boundary edge.