Warp > Stretch Operation > To Stretch Geometry
  
To Stretch Geometry
1. Click Warp > to open the Stretch tab and display the marquee for the geometry.
2. Click until you see the axis aligned in the direction that you want to stretch the geometry. Alternatively, right-click and select Next Axis.
3. If required, click to reverse the direction of the stretch axis. Alternatively, right-click and select Reverse Axis.
4. To customize the marquee for the Stretch operation, click Marquee. The Marquee tab opens.
5. Set one or more of the marquee options:
References—Select optional references for the marquee.
Active Axis—Type Start and End values to determine the size of the marquee. The range depends on the Marquee Size type you selected.
Marquee Size—Select a method of measurement to set the dimensions of the active axis.
 
* When you create an Absolute marquee size and use optional references, you must edit the referenced object outside of the Warp feature to change the marquee's length.
You can also modify the marquee by dragging its faces. For example, if the direction of the stretch axis is along the x-axis, drag the right and the left faces of the marquee to adjust the region for stretching. If the stretch axis is in the direction of the y-axis, drag the top and the bottom faces of the marquee to adjust the region for stretching.
6. Drag the stretch handle to stretch the geometry or double-click the value for scale and enter a new value. Alternatively, type a value for stretching the geometry in the Scale box on the tab.
7. Select any warp operation to complete the current warp operation or click to complete the Warp feature.