Change your foreground palette to grey and then brush over the elements that you think would still be in relative focus. If you want to blend together your sharp elements with your blurred areas to make the transition look convincing you can apply a grey layer mask. Simply change the colour in your foreground palette to white and paint over it again. If you think that you have applied too much Layer Masking as youвЂ™re going along, itвЂ™s easy enough to paint out your mask with a white Brush. TIP: If you want to move around your canvas easily without using the scroll bars, you can hold down your Space bar and drag the canvas with your left-mouse button or your graphics pen. With your Layer Mask thumbnail still selected use a black brush to paint over the areas you want to be sharp. Using a black colour will reveal the image underneath (in this case our sharp version of the flowers), whereas a white colour will erase any unwanted applied masking. You apply a Layer Mask using the Brush Tool with a Soft Brush selected. It will allow you to reveal more or less of the layer underneath and itвЂ™s a much better technique to use than the Eraser Tool as itвЂ™s completely reversible. Masking is a really good technique to master in Photoshop. A white rectangle will appear in your вЂBackground CopyвЂ™ layer. With the вЂBackground copyвЂ™ layer still selected add a Layer Mask by clicking on the вЂAdd Layer MaskвЂ™ icon at the bottom of the layers palette (this looks like a circle in a rectangle). Now hereвЂ™s where we can set the areas that will remain in sharp focus to give us our depth of field effect.

Febio postview plot function of depth