GTA
For the Playstation 3, press L1. For the Xbox 360, press the same button in the same spot as the Playstation 3 :)
Press and hold the top screen when you're near the cab/taxi
d button
It is not possible to use the blinkers in GTA V.
Call Of Duty by far
triangle
kamehameha
Unfortunately, you cannot connect the cab of a lorry to the trailer's as they are stationary and will not move.
In GTA 4, you can make calls by opening the in-game phone with the "Up" button on console or "T" on PC, then navigating to the "Phonebook" or "Contacts" option to select a contact to call. Use the trigger buttons to dial the number, then press the green phone icon to initiate the call.
Call Of Duty 4
Press the triangular button on controller.