The Heading indicator contains up to three needles, two of which respond depending upon the Radio Beacon Frequency you have selected, VOR Beacon and NDB Beacon.
The course (heading, with the orange arrow) is selected by rotating the Heading Bug to track the selected Radio Beacon.
As you pass the Beacon(s) the needle(s) will swing round...from "TO" to "FROM".
Have a peek at Brett Henderson's Course on Radio Navigation...

...!
Paul...G-BPLF...FS 2004.... 8-)...!

Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.