Objects creation and modification	Modifying existing objects
Resizing or reshaping objects
Overview     Operations     Commands

It is possible to resize objects to elongate them or shorten them in only one direction or to make them proportionally larger or smaller.

It is also possible to stretch certain objects by moving an endpoint, a vertex or a control point.

Lengthening objects

The LENGTHEN command allows to modify the included angle of arcs and the length of the following objects:

• Lines
• Arcs
• Open polylines
• Elliptical arcs
• Open splines.

The results are similar to extending and trimming. It is possible:

• to drag an object's endpoint dynamically;
• to specify a new length or an angle as a percentage of the total length or the total angle;
• to specify an incremental length or an incremental angle measured from an endpoint;
• to specify the object's total absolute length or included angle.

Stretching objects

The STRETCH command allows to relocate the endpoints of objects that lie across or within a crossing selection window, so that:

• the objects that are partially enclosed by a crossing window will be stretched;
• the objects that are completely enclosed within the crossing window or that are selected individually, will be moved rather than stretched.

To stretch an object, specify a base point and then a point of displacement.

To stretch with precision, use the object snaps, the grid snaps and the relative coordinate entry.

Scaling objects using a scaling factor

The SCALE command allows to uniformly increase or decrease the size of an object. To scale an object, specify a base point and a scaling factor. Alternatively, it is possible to specify a length to be used as a scaling factor based on the current drawing's units.

Scaling changes the size of all the dimensions of the selected object. A scaling factor greater than 1 enlarges the object. A scaling factor smaller than 1 shrinks the object.

The NUSCALE command allows to use a different scaling factor for the X and Y axes.  

Scaling objects using a reference distance.

It is also possible to scale by reference. When scaling by reference, an existing distance is used as a basis for the new size. To scale by reference, specify the current distance and then the new desired size. For example, if one side of an object is 4.8 units long and it needs to be expanded to 7.5 units, use 4.8 as the reference length.

It is possible to use the Reference option to scale an entire drawing. For example, this option can be used when the original drawing units need to be changed. Select all objects in the drawing, then use Reference to select two points and specify the intended distance. All the objects in the drawing will be scaled accordingly.

Shearing (tilting) objects  

It is possible to shear objects on any axis using the SHEAR functions. The axis to be tilted can be the X axis, the Y axis, or even any other axis.

There are two ways to shear objects:

1. shearing in constant area mode or
   
2. shearing in assonometric mode.
   

Adding new vertices to Polylines, Splines and Regions

The command ADD_VERTEX add a new vertex.
The command DEL_VERTEX delete a vertex.

Also see

Breaking and joining objects