Great-Circle Map
The map hams aim beams with: every place at its true heading and distance from you.
About this tool
Why this map?
On an ordinary map, a straight line is not the shortest path. On an azimuthal equidistant map centred on you, every straight line from the centre is a great circle: its angle is the beam heading and its length the true distance. That's why hams print one for the shack wall.
Reading it
Rings mark every 2,500 km. The edge of the circle is the antipode, the point exactly opposite you on Earth, about 20,000 km away. Countries far from you look stretched; that's expected.
Short and long path
The short path is the direct heading. The long path points the other way (heading + 180°) around the world and sometimes works better on HF at dawn or dusk.