3. How to Add Global Adjustments
Step 1
Add a Brightness/Contrast adjustment layer, and change the Contrast value to 15, or any value that suits your image.
Step 2
Add a Color Lookup adjustment layer, and choose the Cobalt-Carmine table from the Abstract menu.
Change the Color Lookup layer's Blend Mode to Soft Light and its Opacity to 50%.
4. How to Create a Halftone Texture Overlay
Step 1
Create a new layer on top of all layers and name it Halftone Texture.
Step 2
Go to Edit > Fill, and set the Contents to 50% Gray.