Easy as 1…2…3,Select the region,Download the images,Union the images to large,and You Are Done! Step 1: Select the region The way A:Click and move the mouse to select the region of you need downloading,then double click in the rectangle region will show the "New Task" dialog. The way B:Click the button "New Task" on the toolbar will show "Set Download Range" dialog, set the longitude/latitude range in the dialog and click "OK" button will show the "New Task" dialog. Step 2: Download the images In the "New Task" dialog, give the task name and select the levels of you want to download,then click "OK" buttons to create the new tasks. The new tasks are working by automatic when the tasks by create. Click the "Download Monitor" label to show the downloading progress. Click the "Download Result" label to show the downloading result. Click the "Catalog" on the toolbar will open the folder of the task, you can view the all images of the downloading. Step 3: Union the images to larege Select the downloading complete of task in the "Task List", then click the "Union" on the toolbar to union the small images to large. Select the unioning complete of task in the "Task List", then click the "Catalog" on the toolbar will open the folder of the unioning results,you can view the all large images like below.