How in Homeport to either view a compass rose or the mag direction between two point?

Two points on the chart and I want to know the magnetic direction between them A to B, like 130 degrees, for example. I cannot find how to turn on a compass rose. Or how would I do that?

Also, how do I use measure but with straight lines only. Like holding down the shift key in Photoshop when drawing a simple line, for example.

Thanks