Golden Triangles split the frame into three triangles and provide a guide when the composition includes strong diagonal elements.
To apply this rule, place the main subject inside one of the triangles or at the intersection of the guiding lines. Place diagonal supporting elements along a guiding line.
Tap the screen to move the triangles.
NOTE: The Golden Triangles composition rule is based on the Fibonacci ratio of 1.618, which might not be the same ratio as your photo.