JOSM
Shortcuts:
C←↑→↓,: move viewport;
1, drag to select;
3, drag to zoom;
M⇧l, list of layers;
M⇧p, list of tags;
M⇧t, list of selection;
M⇧r, list of relations;
M⇧f, filter objects;
Ca, select all;
Cf, search objects;
ESC, select none;
Cw, toggle wireframe view;
Cm, merge layers (downwards layer-by-layer);
C⇧m, merge selection;
⇥, toggle sidebar;
