## BkImg (Background images)

It changes the position and the size of background images loaded by [View] [Set background images] menu or [Load] displayed in the left top of the view.

It moves with dragging the center of background images and change the size with dragging the edge. It scales in the same aspect by dragging the corner point with pressing Shift key.

The background image can be switch showing or hiding with [BkImg] button on the title bar of the top of each view.