Despite the fact that banjo players spend half their life tuning (and the other half playing out-of-tune), I assume you're dealing with one of those tuners (like the Intellitouch models) that clip to the peghead -- not the neck.

Typically, they clip on so that the viewing screen faces the back of the peghead, where you can see it. I have see a smaller type, oval in shape, where the viewscreen is facing front. I think that kind has a swivel so that it can be turned to 90 degrees angle, so you can see it, way out there at the end of the strings. I think these are harder to use, since the natural angle for holding the instrument means you have to cock your head over unnaturally to use it. In this case, you "hang your head over/ watch the dial glow").

Good luck.

Bob