How to make a mosaic of photos in PhotoShop
Wednesday, March 10th, 2010In this “How to…” I will showing you how to make a mosaic of photos in PhotoShop like the ones I have in my weekly feature called: “50 Things I {heart}”.
Your final image will look similar to this one.
First create a new image 375 pixels wide x 375 pixels high with a resolution of 72 pixels/inch. This resolution is good for web applications. If you’d like to print your image the best quality is 300 pixels/inch. Color Mode: RGB and the Background can be any color…I chose Transparent.

Next, open an image you’d like to use in your mosaic.
Using the Rectangular Marquee Tool, select the area of the photo you’d like to use in your mosaic.
Holding down the shift key, will lock the proportions into a square.
Once you have selected the area you’d like to crop, Go to Image, Crop.
Resize the image to 125×125 pixels by going to Image, Image Resize, 125, 125.
Using the Rectangle Marquee Tool, select the entire image and go to Edit, Copy (or Ctrl “c”). You now have that area of the photo copied onto your clipboard.

Go back toyour 375×375 image and go to Edit, paste (or cntl “v”).
Your cropped image will come into your 375×375 image on it’s own layer. Making sure you have that layer selected, use the “Move Tool” to move the image to where you want it. Repeat the last steps until you have enough square images to fill the 375×375 image.
You should have a total of 10 layers.
Once you have all your layers, you will have “flatten” down your file to one layer. To flatten, go your layers window and click onto the button that looks like an arrowhead inside a circle. A pull down menu will come down, choose “Flatten Image”.
Once the layers are flattened, go to Save As, select .jpg and you’re done!!!
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