You can apply special effects to a layer, hide or show the styles in a layer, and even change the scale of a layer style (for example, decrease or increase the size of a glow effect). It’s easy to copy a style from one layer to another.
Apply a layer styleSelect a style, and click Apply.
Double-click a style.
Drag a style onto a layer.

If you don’t like the result, press Command+Z to remove the style, or choose Edit > Undo.
You can also drag the style to the image, where
it is applied to the selected layer.
Hide or show all layer styles in an image
Choose
one of the following:
Layer > Layer Style > Hide All Effects.
Layer > Layer Style > Show All Effects.
Edit a layer’s style settingsYou can edit a layer’s style settings to adjust the effect. You can also copy style settings between layers and remove a style from a layer.
Double-click the starburst icon
in
the Layers palette.
Choose Layer > Layer Style > Style Settings.
Change the scale of a layer style
Copy style settings between layers
Remove a layer style