Draw rectangular shapes with the Rectangle tool

Select the Rectangle tool (U) .

Use the Options bar to customize tool settings, like Fill, Stroke, Width, and Height, to get the effect you want.

Draw shapes or paths on the canvas.

• Draw a rectangle: Drag diagonally in any direction. 
• Draw a square: Hold down the Shift key and then drag diagonally in any direction.
• Draw from the center out: Position the crosshairs where you want the center of the shape or the path to be, hold down Alt (Windows) or Option (macOS), and then drag diagonally to any corner.