Even more useful would be the ability to select and move or delete a single red cross. At present, if you want to move a red cross, the only option available is to delete the every red cross and start again.
(Actually, there's no real need for a move function. Just the ability to delete a specified red cross would do; easy enough to create a new one).
Addressed in #73 . All overlay points (controls, S, F, crossings, 'X') can be independently moved by dragging on the map. They can also each be edited (including deletion), by double-clicking.
Even more useful would be the ability to select and move or delete a single red cross. At present, if you want to move a red cross, the only option available is to delete the every red cross and start again. (Actually, there's no real need for a move function. Just the ability to delete a specified red cross would do; easy enough to create a new one).