How do we make an image look darker using Photoshop?

• Use Ctrl+J to duplicate the image layer
• Click on the top layer and change the blend mode to either Multiply or Overlay
• Go to Image > Adjustments > Levels
• Adjust the middle node (sliding right makes darker image, sliding left makes lighter image) till you get your desired outcome.

How do we change a layer’s opacity?

• Right click a layer > Blending Options…
• Change the Opacity value

How do we straighten a photo (transform perspective while cropping)?

• Hold down the Crop tool and select the Perspective Crop tool
• Draw a marquee around the distorted object. Match the edges of the marquee to the rectangular edges of the object.
• Press Enter (Windows) or Return (Mac OS) to complete the perspective crop.

How do we crop a photo with 4×6 ratio?

• Hold down the Crop tool and select the 2:3 (4:6) from the drop down box on the top panel.
• Resize the grid to appropriate size.
• Right click on the image and select Crop.

How do we horizontally straighten a photo?

• Hold down the Ruler tool and draw a line as the new horizontal.
• Click Straighten Layer on the top panel.