Adding a Border.

To add a border to your work you have to first merge all of the image layers.

You first have to select all of the layers so as you can merge them. 

You can then go to 'Layer' and then 'Merge Layers' to make it so as al of the images on the page are now one. 

To now get the border:

You choose 'Edit and then 'Stroke so as it shows a box like this:

This box will allow you to choose the colour and thickness of the border that will be put around the picture and can also be changed at any time. When you have chosen what you want, just click n okay to save the border changes.