door trigger range

to make a door, first you make a wmb, then you attatch the door template on it. is this right? afterwards how do you open that door? how do you make a trigger for it?

you take your level and then theres a button
Add map entity then you open your door and give it the door action thats all

its really frustrating because to open the door i need to stand in a specific place and then press ctrl. is there any way to make the trigger range bigger? so if i press ctrl anywhere near the door itll open?