How to setting the gridlines for iPhone.
1. Go to Settings.
2. Photos Camera.
3. turn on Grid.
4. Go to App Camera.
5. You will see the grid with four points.
How to activate camera gridlines in Samsung.
1. Open the camera app.
2. go to setting in the upper right corner.
3.Turn on Gridlines switch to activate it.
4. Set a 3x3 gridlines.
5. Return to camera app.
6. You will see the gridlines.
The ideal position is actually atop of one of the four points Where two lines intersect.
1. Open the camera app.
2. Set the photo on horizontally lines.
3. Compose to models on eyes of the directly in the center of the frame.
4. If the model is a bit far. It’s also a bit close on the top of her head and overall the portrait.
5. And if the model is too far compose to her body
6. Finally you got the perfection compose top the bottom.
Thank You