Apply Style to a Portion of an Image
Apply a style to a portion of an image.

Do it for me 1. Select the Magnetic Lasso tool .

The border of the magnetic lasso snaps to the edges of a selection. (You may want to use a different selection tool depending on the shape of the object you want to select.)

2. Select the desired tool options in the options bar.

Feather creates a soft-edged selection, and is generally not recommended when applying most styles.

Anti-alias smooths the jagged edges of a selection, and should usually be enabled for best results.

Width specifies detection width of the lasso, Edge Contrast specifies the lasso's sensitivity to edges, and Frequency specifies the rate at which the lasso sets fastening points.

3. Click in the image to set the first fastening point as an anchor. Then, move the pointer along the edge you want to trace and drag back over the starting point and click to close the border.
Do it for me 4. Choose Layer > New > Layer via Copy to create a new layer.
Do it for me 5. Choose Window > Show Layer Styles, and apply a style of your choice by clicking on it.
Do it for me 6. If you need to adjust the sizing of the layer style, choose Layer > Style > Style Settings.