You can resize any box by modifying the size of its bounding box. A bounding box is a nonprinting, rectangular shape that encloses every box. The box’s item handles demarcate the bounding box. The best way to view the bounding box clearly is to use the Item tool to select item handles on a Bézier box.

You can resize active boxes using any of the following methods:

• Select the Item tool or a Content tool and move the mouse pointer over a selected box’s item handle to display the Resizing pointer. Click and drag the handle to a new location to reduce or enlarge the box. Press Shift to maintain the box’s aspect ratio. Press Option/Alt to resize the box from the center. Press Command/Ctrl to resize the box contents along with the box.

• Enter values in the W and H fields of the Classic or Space/Align tabs of the Measurements palette to change the width and height, and then press Return/Enter.
• Choose Item > Modify (Command+M/Ctrl+M), and then click the Box tab. Enter values in the Width and Height fields to precisely change the size of a box, and then click OK.