"Sheer" applies cross or linear noise to the picture. This is useful when you want to add a rough atmosphere to your work. There are five types of sheer filters: "Cross", "Line", "Circle", "Square", and "Hex".
Tap ②Filter from the ① Tool Selection window .
Tap ①Sheer (Line) . Set the Size, Direction and Amount as you like and tap ②✓button .
And you're finished.
The pictures above is an example of applying Sheer (Cross), Sheer (Circle), Sheer (Square), and Sheer (Hex).