How to Merge Pictures Together into One Document
Merging pictures into one document is not too difficult. To begin, open all of the images you want to use.
Once all of your images are open, create a new document. Depending on what you are attempting to do, you may need to constantly adjust the width and length of your new document. For example, if you are creating a poster you may want the length bigger than the width. If you are creating a portrait, you would likely want the width to exceed the length. Hit "OK" when you have decided on your width/height.
In order to get images from your open files onto the new document is simple.
Begin by selecting the entire image. In order to do this click Ctrl + A. Once the whole image is selected, click Ctrl + X in order to copy the image. If your image was removed doing this, do not fear! This is supposed to happen. Go to your new file and click Ctrl + V to paste the image.
Resizing Your Image
In order to resize the image, it is recommended you do this before you begin merging your images together. Regardless, the most simple way to do this is to select the image:
(Ctrl + A) > Edit > Transform > Scale
From there you can use the boxes along the side of the image to make it wider, thinner, taller or shorter.
After you have adjusted the image, click the button on the top left hand corner to "Apply."
Painting the Background
In order to add colour to your background, click the Paint Bucket Tool located on the left hand side of your tool bar in Photoshop. From there, go to the top right hand side to change your colour. Take your bucket tool icon and click anywhere on the background of the image.