It's not difficult if you burn it into your setup routine. Start with the the club in your right hand and walk up to the ball. Get the right forearm in line with the shaft and adjust your body to it while taking your stance. Either set your grip ahead of time or after you've taken your stance. Now use extensor action to stretch the left arm without changing the right elbow bend. Don't move your spine up or down once you've set the alignment except to adjust for low point and permit extensor action.
You'll probably note a couple of things. You will "feel" more bent over by a few inches and the right shoulder will "feel" more "down" at address causing what "feels" like some tilt to the spine/shoulder.
Using quotes here because you won't see much difference on video.
I really like Ben Doyles setup routine for all of this.
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Bagger
1-H "Because of questions of all kinds, reams of additional detail must be made available - but separately, and probably endlessly." Homer Kelly