F5 — reload the page and display the form for loading image again
` && |\n| && - `S — save map params in localStorage
` && |\n| && - `ENTER — stop polygon drawing (or click on first helper)
` && |\n| && - `ESC — cancel drawing of a new area
` && |\n| && - `SHIFT — square drawing in case of a rectangle and right angle drawing in case of a polygon
` && |\n| && - `DELETE — remove a selected area
` && |\n| && - `ESC — cancel editing of a selected area
` && |\n| && - `SHIFT — edit and save proportions for rectangle
` && |\n| && - `I — edit attributes of a selected area (or dblclick on an area)
` && |\n| && - `CTRL + C — a copy of the selected area
` && |\n| && - `↑ — move a selected area up
` && |\n| && - `↓ — move a selected area down
` && |\n| && - `← — move a selected area to the left
` && |\n| && - `→ — move a selected area to the right
` && |\n| && - `