Now grab rounded rectangle tool from the tool panel. You can also press Shift+U again and again until it comes.
Now in the option bar, make sure the mode is shape.
Now drag and drop the mouse cursor from the top left end to the bottom right end to make a rounded rectangle.
Once you have drawn the rectangle, press F7 for the layers palette. Right click on the rounded rectangle layer 1 that is the layer which contains rectangle and then click on rasterize. When we make an vector diagram in Photoshop then we wouldn’t be able to edit it until we rasterize it. That’s why I clicked on rasterize.
Once you have rasterized the angle then your half work is done. Now you just need to do some finalization.