The fastest way to merge pictures in Photoshop
Open Photoshop and create a new document large enough to hold all your images side by side or stacked. Go to File > New, then set the width and height to accommodate your layout — for example, if you're placing two 1000-pixel-wide images side by side, make your canvas 2000 pixels wide. Set the background to white, transparent, or whatever you prefer.
Once your blank canvas is ready, open each photo you want to merge. Go to File > Open and select your first image. Then repeat for each additional photo. Each image opens in its own tab at the top of the workspace. Click the tab of the image you want to move, select the Move tool (the cross with arrows), then drag that image onto your blank canvas. Repeat for each photo until all images are on the same canvas.
Each image you drag onto the canvas becomes a new layer. You can see all your layers in the Layers panel on the right side. Click and drag layers to reorder them, or use the arrow keys to nudge images into position. When you're satisfied with the arrangement, go to Image > Flatten Image to merge all layers into one, then save your file.
Key Takeaways
- Create a new blank canvas sized to fit all your images, then drag each photo onto it as a separate layer.
- Use the Move tool to position each image exactly where you want it on the canvas.
- The Layers panel shows every image as a separate layer, so you can reorder or adjust them before flattening.
- Flatten the image when you're done arranging to combine all layers into one file before saving.
- Photoshop's grid and guides help you align images evenly if you need them perfectly straight.
Creating a canvas that fits your images
The size of your new document determines how much space you have to work with. If you're merging two 1920 × 1080 images horizontally, your new canvas should be at least 3840 × 1080. If you're stacking them vertically, make it 1920 × 2160. Add extra pixels if you want padding or space between the images.
When you create a new document, Photoshop asks what color you want the background to be. Choose White if you want a solid white border, Transparent if you plan to place this image on a website or want no background, or Background Color to use whatever color you've set as your background. You can always change this later by adding a new layer beneath your images.
Placing and positioning your images
After you open each image as a separate file, switch to the Move tool by pressing V on your keyboard or clicking the cross-with-arrows icon in the toolbox on the left. Click on the image you want to move, then drag it onto the tab of your blank canvas. The image appears on the canvas as a new layer.
Once an image is on your canvas, you can reposition it by clicking and dragging with the Move tool still active. If you need precise alignment, turn on the grid by going to View > Show > Grid. The grid overlay helps you line images up perfectly. You can also use View > Guides to create custom guide lines where you want images to meet.
If an image is too large for your canvas, you can scale it down. Right-click the layer in the Layers panel and choose Scale Layer, or go to Image > Scale Image while that layer is selected. Drag the corner handles to resize while keeping the image proportions locked.
Arranging layers and managing overlap
Every image you add to your canvas becomes a layer in the Layers panel. The order of layers determines which image appears on top if they overlap. Drag a layer up or down in the panel to change which image is in front. The layer at the top of the panel appears on top of the canvas.
If you want to blend images where they overlap, select the top layer and lower its Opacity slider in the Layers panel. This makes the layer semi-transparent so you can see through to the layer below. You can also change the Blend Mode dropdown from Normal to options like Multiply, Screen, or Overlay to create different blending effects where images meet.
To erase part of a layer so another image shows through, select the layer and click the Eraser tool (or press E). Adjust the brush size and hardness in the tool options, then paint over the area you want to remove. Use a soft brush for a gradual fade or a hard brush for a sharp edge.
Flattening and saving your merged image
When all your images are positioned and arranged the way you want, flatten the document to combine all layers into one. Go to Image > Flatten Image. This merges every layer into a single background layer and removes any transparency. If you have transparency you want to keep, skip this step and save as a PNG file instead.
To save your merged image, go to File > Export As (or File > Save As if you want to keep it as a Photoshop file). Choose your format: JPEG for photos and web use, PNG for images with transparency, or TIFF for high-quality archival. Give your file a name and click Export.
Using Photoshop's alignment tools for perfect placement
If you need images aligned perfectly without measuring manually, use the Align tools. Select multiple layers by holding Shift and clicking each layer in the Layers panel. Then go to Window > Align to open the Align panel. You'll see buttons for aligning layers left, right, top, bottom, or centered.
The Align panel also includes distribution options that space multiple layers evenly. For example, if you have three images you want spaced equally across your canvas, select all three layers, then click Distribute Centers Horizontally. Photoshop automatically spaces them with equal gaps between them.
Merging images with different sizes or aspect ratios
When your images have different dimensions, you have two choices: resize them to match, or create a canvas large enough to fit them all at their original size. If you want all images the same height, select each layer and go to Image > Scale Image. Set the height to your target size — the width adjusts automatically to keep the image proportions correct.
Alternatively, you can crop images to the same aspect ratio before merging. Open each image, go to Image > Crop Image, and set the dimensions you want. This removes parts of the image but ensures everything fits together neatly without awkward gaps or stretched photos.
Frequently Asked Questions
Can I merge images without creating a new blank canvas?
Yes. Open one image, then go to File > Open as Layers and select the other images. Photoshop adds each one as a new layer on top of your first image. You'll need to resize your canvas to fit all of them, so go to Image > Canvas Size and increase the width or height as needed.
What's the difference between flattening and merging layers?
Flattening combines all layers into one and removes transparency, turning it into a solid background. Merging layers combines only the selected layers. If you want to keep some layers separate for editing later, use Merge Down (right-click a layer) instead of Flatten Image.
How do I make images blend smoothly where they meet?
Use the Eraser tool with a soft brush to create a gradual fade at the edges where images overlap. Lower the opacity of the eraser brush to 30–50% for a subtle blend. Alternatively, add a layer mask to the top image, select the mask, and paint with a soft black brush to fade the edges gradually.
Can I undo changes after I flatten the image?
Flattening is permanent once you save the file. Before flattening, save a copy as a Photoshop file (.psd) with all layers intact. Then flatten a separate copy for export. This way you can always go back and edit individual layers if you need to make changes later.
What canvas size should I use if I don't know my image dimensions?
Open each image and check its size by going to Image > Image Size. Write down the width and height of each image, then add them together based on how you're arranging them. If you're unsure, start with a larger canvas than you think you need — you can always crop it down later.