Except for putting, you pretty much want to use a full stroke. Half the swing meter is usually well less than half the distance. when between clubs, I will shave a bit off the top end of a stoke to reduce the distance a bit.
You can change the impact point on the ball. Assuming no wind, lowering the contact point reduces the distance somewhat (less roll) and raising the contact point increases the distance somewhat (more roll).
Changing the contact point also alters the ball's trajectory - lower = a higher trajectory, and raised = a lower trajectory.
I made a paper scale for putting that divides the swing meter into 10ths. I use a bit of gaffers tape to attach the scale to my computer display.
If I want a putt to go about 30 feet I use the 300 foot scale and the 10% mark on my scale. For a 10 foot putt I use the 100 foot scale and the 10% mark on my scale. The short stroke is easier to 'ding'. I rarely use more than a 20% stroke on the scale. If a put is over 60 feet, I usually use a wedge instead of the putter. Wedges work differently on the green (no point of contact choice, less distance) than they do on the rest of the course.