1. Download size - This label will show you the total number of tiles and megabytes of your currently selected area. For most map types, you can download up to 30,000 tiles at a time.
2. Zoom range - Use this slider to select the max zoom level to download - the tool will download all zoom levels up to the value you specify. Keep in mind that each zoom level contains about 2 times as much data as the previous level, so you can cover a lot more area if you omit the highest zoom levels.
3. Select area - Drag your finger to select an area to download.4. Save to finish - After you have selected the area and zoom levels you want, press Save and the map download will begin. You can check the status of the download or view a saved map by selecting Saved Maps from the main menu.