"Tethered shooting" or "tethering" is what you want to do. Normally, it involves special software, a cable set connected to the camera and a computer, and a computer monitor or laptop. A few years back, many cameras came with software for this, but as time has passed, the d-slr manufacturers have realized the demand for it is much less now,and have dropped out-of-box software with "most' of their cameras. A Google search for "tethered shooting software" + your camera model ought to turn up various options. I believe the Phase company's CaptureOne software can provided tethered shooting for many,many different camera models.