How do I change a photo to sepia in Photoshop?
--- It's easy! Use the Sepia Photo Filter to create a soft sepia effect. The Sepia filter is preset Photoshop filter.

--- Open the image in Photoshop.
--- Make the image black and white (Go to Image > Adjustments > Desaturate or Black&White)
--- Go to Image > Adjustments > Photo Filter and choose Sepia

--- To create realistic sepia photo effect, use the Gradient Map adjustment layer. Choose sepia color tones for the gradient.
--- But what is the color code for sepia? The sepia color code is # 704214

What colour is sepia in Photoshop? You can use the sepia color chart to choose tones of brown.

--- Our action pack contains Sepia Photoshop filter with 8 different sepia color effects.
--- So, to create an old photo effect simply play one of the sepia actions. Then make adjustments to create the look that you like best.
--- The pack contains 8 actions that you can edit and customize.
--- The action stops for you to choose the sepia color tones and the contrast of the image.
--- After the action ends all the layer and adjustments are intact. So, you can edit the sepia effect.
--- Double click on the thumbnail of the adjustment layer (Gradient Map, Hue/Saturation, Levels) to edit the sepia color and other effects.
Vignette Photoshop Effect
--- To create a realistic vintage photo, beside the sepia filter, the action also adds a realistic photo vignette.
--- You can edit the Photoshop vignette, change the opacity, the size or remove it.

Film Grain Photoshop Effect
--- The sepia action also adds a film grain effect using the Noise filter.
--- By adding the sepia Photoshop filter, the photo vignette and the film grain effect the action creates a realistic old photograph.