When you have an image that is not a standard size, how does one create a border (mat) around it along with a copyright notice? Here's the procedure:
Open your image file
To maintain consistency, make sure the ppi is set to 300 by going to <Image> <Resize> <Image Size> and set the PPI (pink arrow) to 300 BUT before you do that, UNCHECK the Resample Box (green arrow). Click OK.
Now your image is set to 300 ppi. For the screen it's not an issue but when you print it out, it's important. Now we're going to make the Background (on the Layer's Palette - pink arrow) into a Layer. Just double click on the Background and the Layer's menu pops up (pink outline). Just click OK.
Next, we're going to ADD a layer ABOVE the image. Click on the Icon (pink arrow) and a New Layer will appear above the image (green arrow).
Next, we're going to increase the Canvas Size. Click on <Image> <Resize> <Canvas Size> and click on the Relative Box (blue arrow) and insert a size Horizontal and Vertical. In this case it's .75 (3/4) inch for this image. This size may vary depending on the original size of your image.
Now you should have a transparent border around the image. Making sure the top layer is selected, Now we're going to add a stroke (line) around the image on the outer border. <Select> <All> (CRTL A) and you should have marching ants around the outer border of the image. Go to <Edit> <Stroke>
select the INNER stroke, your color and the size. I used 16 pixels for this one. Click OK. Now you'll have a border around the outer edge of the image. Make sure the upper layer is selected (pink arrow).
Now we need to add a bottom layer. Make sure your image layer is selected (pink arrow) then click on the icon at the top that looks like a page (blue arrow) while HOLDING DOWN THE APPLE KEY. Holding down the key while you click on the icon is kinda critical as it'll put a new layer UNDER the image layer (green arrow).
Next, make sure you've selected the bottom layer (pink arrow) and change the Canvas Size again and <Edit> <Fill> the layer with whatever color you want (in this case White).
Now you can put your text layer. It's easier if you zoom in and you should make sure that the top layer (pink arrow) is selected.
Add and position the text you want on the image. The size you use will depend on the font file that you use.
Position the text to your liking then select the stroke layer (pink arrow), select the Rectangular Marquee tool and select the area of the border you want to delete (pink box).
Once you're happy with the selection, hit the Delete (or backspace) key to remove the border.
If you're happy with the result, Flatten the image and save it to your HD in a different folder.
End of today's lesson. If you think you're going to make changes later, save it as a layered .PSD file which will allow you to make edits without starting over.