How to read a compass

You say: whether the red line is "mountain" or "direction", in which "mountain" should be "sitting",

To book a house, first point one of the two crossing red lines at the door.

Then turn the disc of the compass and center the compass.

After that, the first half of the red line across the hall is on that mountain, which is the mountain it points to, and the second half is on that mountain, which is the mountain where you can sit.

I hope you have understood.