“Lens Blur” applies a blur to the layer as if it was shot with an SLR camera lens. It can be used to various scenes such as background for characters. It's especially recommended when working with night views.
Import photo to canvas and tap ②Filter from the ①Tool Selection window .
Tap ①Lens Blur .
Drag and adjust the sliders of the ①Radius, Brightness, and Direction as you like. When finished, return to canvas with②✓button.
And you're finished.