How do I change tactics such as 'target many supply and 'long shot frequency'

Well, you can instruct your players from Player Instruction Screen to shoot less often (for less long shots) or from the Team Instruction Screen you can tell your team to Work Ball into Box (for less long shots). Or you can do the opposite and instruct them to Shoot More Often and unticking Work Ball into Box.

Regarding of Target Man, you can select from Team Instructions which way you want your crosses to fly. (low, whipped, floating). You can also go to specific player instruction screen and select the way you want them to cross (each and one of them).
 
Top