Button or Menu
As description in Lesson 1, the simplest way is click Import Image button or File/Import Image menu, then choose a image file from the Import Image window below.
Source Panel
Direct double click one of two source panels will launch the Import Image window also.
Drag from Built-in Image Viewer
When source images are too many, choose a expecting file may be difficultly. In this case, press F9 key or choose Tools/Image Viewer menu, the image viewer will appear. Adjust its window size and position to suit for viewing. Using this simple and fast tool with thumbnail preview you can explorer all supported image resources in your disks. Then click the expecting file and drag it to the image area in the main interface.
Drag from External Program
Like dragging from built-in image viewer, you can drag one image file from other external program you favor to explorer images such as Windows Explorer or ACDSee to the main interface.