Using the Scale Tool

The Scale tool can be used both to scale and rotate an object. With the Scale tool, you can proportionally scale an object, or you can distort the object by dragging a handle on one of the sides.

1.

With the triangle still selected, choose the Scale tool on the Tools panel. Handles appear around the triangle. Move the pointer close to (but not touching) one of the corner handles. The pointer changes to a circular arrow, indicating that you are in rotating mode. Move the pointer on top of one of the handles. The cursor changes to a double-ended arrow, indicating that you are in scale mode.

2.

Hold down Alt (PC) or Option (Mac) and drag one of the side handles, moving it in toward the center. You want a skinny triangle. When the triangle is the size you want, press Enter (PC) or Return (Mac) to set the size. The bottom vertex of the triangle should be on the vertical guide. Holding the Alt or Option modifier key as you drag resizes the triangle from the center, so it remains on the vertical guide. Tip To scale the triangle from the center you can also choose Modify > Transform > Numeric Transform. Choose Scale from the pop-up menu. Deselect Constrain Proportions and then enter a smaller value for the width percentage. When you click OK, the triangle width is resized from the center.