Three good answers. The 275 can show several navigation needles concurrently: HSI, Bearing Pointer 1 and Bearing Pointer 2. If the GTN650 is set up as Nav 1 and the GNS430 is set up as Nav 2 the following will work. If using the 650 for either direct to navigation or a GPS approach, Bearing Pointer 1 is GPS is selected will point to either the direct to waypoint or the next waypoint. If being vectored for an approach, the HSI indicator may be pegged awaiting alignment on course while the Bearing Pointer 1 is pointing directly to the waypoint. Really kinda redundant information with that nice big map shown on your iPad. I also used the Bearing Pointer to keep track of a nearby airport when doing aerobatics. No matter how many rolls or loops, the pointer always showed direction to the nearby airport.
Whatever you're doing with Nav 1, if you enter the NDB on Nav 2 Direct, the Bearing Pointer 2 will point to it. I actually demonstrated to someone how IFR was done in the olden days, flying the bearing pointer to a NDB waypoint, and how to correct for a cross wind to and from. Ha, back in the day, two airports that were routine stops only had NDB approaches.