First, establish eye level, which in most houses is 57 to 60 inches from the floor.
The center of the picture should be at this point.
Second, consider your space. Is your artwork landscape or portrait?
Coordinate that with the space, or hang portraits side by side and landscapes one on top of the other.
Third, keep it neat.
If you’re creating a gallery wall, align them on a grid.
You can also begin with one in the center, and arrange outward.
Above all, look for symmetry. It’s important that everything is even throughout your home.