The responses given above regarding how to bring a picture to front in Adobe Photoshop is not correct and confusing.

In Adobe Photoshop Version 9 (CS2), in order to bring a picture (a Layer) in front of another picture (Layer), first select the layer of interest by clicking on the layer (picture) or on the palette icon in the right bottom corner of the page, then go to Top bar in Adobe Photoshop, select Layer, go down to Arrange, then select Bring to Front. Similarly, you can send any image to the back of another image by selecting the image and then select Send to Back. Hope now it is clear to you.