So you have a wonderful joke you want to do that involves place a photo of your face on another body. Photoshop is definitely the right tool, and this program is definitely powerful enough. Though this can be done with a mouse, it will go faster and more accurately with a drawing tablet. Either way, the process is still the same.
Load the picture of your face. Move your mouse to the left onto the tools palette and select the "Polygonal Selection Tool." It will look like a rope in the shape of a triangle and allows you to select things with straight lines.
Select the area around your face that are wanting to put onto anther body. Get as close to your face as you can with your selections so it will be clean. You'll click around the entire selection you want and then click once at the very beginning of your line where you first started. Now you will have a moving line around your selection. This called a marquee and will look like a line of ants marching around your selection.
Click on "Edit" at the top and select "Copy." This will copy the part of your face that you have selected. Next, open the image you will be putting your face on. Click on "Edit" and then "Paste". Now your face will appear in the centre of the image you just opened.
Press "CTRL + T" and this will open the free transform tool. With this, you can reposition and resize your face and fit it on top of the other body. Once this is done, click on "Layer" and "Flatten image." Now your face is permanently on top of the other body.
Click on "File" and then "Save as." When you do this, a dialogue box will appear asking where you want to save, under what name to save as, and what file type to save as. You should save in an easy to remember location, and name the file whatever you want. The final thing to select is what type of image you want to save as (this is in the drop-down menu at the very bottom of the box under what to name the image). Jpeg is the most common file friendly format, but select whatever format you desire and then click save to finalise your new body.
Try to make sure the two images you are working with are the same size so that way, there isn't much resizing to do with your head, and it will look clearer.
This article is for a PC running under Microsoft Windows. Though this can be done on Photoshop for Macintosh, it is a slightly different process, and the "CTRL + T" command does not work.