Modify a construction object
You can modify construction points, lines, circles, arcs, polycurves, and planes using direct modification.
Before you start:
 Ensure that the Direct modification switch is active.
 Select the construction object.
Tekla Structures displays the handles and dimensions that you can use to modify the construction object.
When you select a handle and move the mouse pointer over , Tekla Structures displays a toolbar with more modification options. The available options depend on the type of the construction object you are modifying.
To modify a construction object, do any of the following:
To  Do this  Available for 

Set a reference point to move in one, two, or any direction 

Construction points, lines, circle center points, planes 
Move a point, a point on a line, circle, arc or polycurve, or a plane corner  Drag the handle in the reference point to a new location.  All construction objects 
Move a circle or arc  Drag the handle in the center point to a new location.  Construction circles, arcs 
Move a line or a plane edge  Drag the line handle to a new location.  Construction lines, planes 
Move a plane  Drag the plane to a new location.  Construction planes 
Show or hide diagonal dimensions 

Construction lines, planes 
Change a dimension  Drag a dimension arrowhead to a new location, or:

Construction lines, circles, planes Arcs (numeric input only) 
Chamfer a polycurve corner 

Polycurves 
Change an arc to a line Make a curved segment straight 
Select the arc or segment midpoint handle (with an arc symbol) and press Delete.  Arcs, curved polycurve segments 
Change a line to an arc Make a straight segment curved 
Drag the arc symbol at the midpoint of the line or segment.  Lines, straight polycurve segments 
Add a corner point and an intermediate segment to a polycurve  Drag a segment midpoint handle to a new location.  Polycurves 
Remove a corner point and the two connected segments  Select the corner point handle and press Delete.  Polycurves 
Remove the last polycurve segment  Select the end point handle and press Delete.  Polycurves 
Change the radius of an arc and keep the end point locations  Click the radius dimension, enter a new value, and press Enter.  Arcs 
Change the radius of a polycurve segment and keep the end point locations  Drag the arc symbol at the segment midpoint handle.  Curved polycurve segments 
Change the angle or length of an arc  Drag the start or end point to a new location.  Arcs 
Copy a construction object using offset  Lines, circles, arcs, polycurves  
Change the modeling direction of the selected construction object  On the contextual toolbar, click
Swap ends. This may be needed when you create lofted plates or lofted slabs by using construction objects and if the geometry of the plate or slab would become selfintersecting. 
Lines, arcs 