Young Blonde Girl Undresses Her Short Jeans Outside At The Old Wooden Door

Swing direction
Door swings For most of the world, door swings, or handing, are determined while standing on the outside or less secure side of the door while facing the door (i.e., standing on the side you use the key on, going from outside to inside, or from public to private).
It is especially important to get the hand and swing right on exterior doors, as the transom is usually sloped and sealed to resist water entry, and to properly drain. In some custom millwork (or with some master carpenters), the manufacture or installer will bevel the leading edge (the first edge to meet the jamb as the door is closing) so that the door fits tight without binding. Specifying an incorrect hand and/or swing will cause the door to bind, not close properly, or leak (for exterior doors). Fixing this specification error will be expensive and/or time consuming.
In North America, many doors now come with factory-installed hinges, pre-hung on the jamb and sills.