How to draw a straight line in Photoshop

1. Method One
1. Select the layer
2. Select the brush tool (press B)
3. Optional - Press & Hold Ctrl(cmd) + Press & Hold Shift + Press N or select New layer
4. Set Brush panel
5. Draw Straight Line
1. Click any where you want
2. Second click with press & hold Shift Key
3. Continuously you can do this with press & hold Shift Key
2. Method Two (Rigid)
1. Select the layer
2. Select the pen tool (press P)
3. Optional - Press & Hold Ctrl(cmd) + Press & Hold Shift + Press N or select New layer
4. Draw Straight Line
1. Click any where you want
2. Second click with press & hold Shift Key
3. Right click and select stroke path
4. Select Brush/pencil and OK
5. Enter