Numbers
Edit shapes and lines in Numbers for iCloud
You can customize the specific features of some shapes. For example, you can change the standard five-point star into a twenty-point starburst and adjust how rounded the corners of a square are.
You can also change how lines look—for example, be dotted or have an arrow at one end—or make connection lines (a special type of line that you can use to connect two objects) curved instead of straight.