Using the right click button from your mouse, select “Blending Options”.  You will see the Layer Style dialog box.  In the same box, you will find the “Stroke” component in the Styles listing.  You will see it on the right side of the box.

If you want different stroke settings, you can make changes as follows:

•    Changing the size – move the slider to the right for a larger size; move it to the left for a smaller size.

•    Changing position – You have three choices, inside, center or outside.

•    Changing fill type – You can choose from color, gradient or pattern.

You can either choose to change the stroke’s opacity (cloudiness or dullness) or implement blend mode.  After you’ve selected what you wanted, save your settings and close the dialog box.  You will see the changes in the chosen layer of your image or photo.