New feature in Adobe Photoshop CC 2015
We are now able to add multiple effects to create more advanced Layer Styles.
You won’t be able to add multiple Inner Glows, but you can add multiple Strokes, Inner Shadows, Color Overlays, Gradient Overlays and Drop Shadows. This is what the Layer Style window looks like; notice the plus symbols next to the effects.
Here I just wanted to show you guys that you can add multiple strokes now. Before we could only go one at a time.