Things closer to the camera will appear proportionally larger than things further away. This is accentuated when using shorter focal lengths below ~85-135mm, which is why that range is typically used when making portraits.

Assuming your subject is standing straight, shooting at their head level will be flatting for most people. Shooting up will result in large feet and legs, small torso and head, this is not usually flattering for women, can be flattering for men. Shooting down will result in a large head, broad shoulders, slimmer waist and slim/small legs, this is usually flattering for both men and women.

>>2879954
I take pictures with my phone,no money to buy a decent camera.Should i use matrix focus or central?I want to stand at the corner of the picture

>>2879949
You look small as fuck in this, if anything you shpuld wanna look bigger

Wear a tighter jumper if you wanna be skinnier

>>2879965
It's not me in this pic man

>>2879959
The focus mode you use shouldn't matter at that focusing distance when using a phone.

Most phones are around 28mm equivalent focal length, for a full body portrait you will get minor distortion but it shouldn't make you look "fat" if you are posed standing up (like the example you provided) and the camera is not at an extreme angle.