You draw straight lines by using the pen tool to create a starting anchor point and an ending anchor point. You can create straight lines that are vertical, horizontal, or diagonal by holding down Shift as you click with the pen tool. This is called constraining the line.
We've created a template layer in this file so you can practice using the pen tool by tracing over the template. (See Lesson 10, “Working with Layers,” for information on creating layers.)
You'll begin by drawing the straight line for the arrow.
Choose View > Straight Line to zoom into the left corner of the template. Separate views that show different areas of the template at a higher magnification were created for this document and added to the View ...