Capture is accomplished by tapping anywhere on the screen or by pressing the dedicated dual-stage shutterkey (which lets you focus ahead of time by pressing halfway).
Posing next to 24mm and 50mm lenses, the NEX-6 looks to be very much the in-between camera we suspected it was, without as much dedicated control as the NEX-7 but still carrying an electronic viewfinder, a pop-up flash and a dedicated function key near the shutter release.