## BkImg (Background images)

It changes the position and the size of background images loaded by [View Header > Disp > Background image > ] or [Load] displayed in the left top of the view.

### Set background images

Load
  It loads a background image.
View
  It displays the background image specified by [Load].
OK
  The image loaded by [Load] is displayed on 3D view when this button is clicked.
Cancel
  Cancel the setup of background image.

### Display option

Load
  It loads a background image, and displays it on the view.
Reverse H
  It reverses a background image horizontally.
Reverse V
  It reverses a background image vertically.
Reset
  It restores a position and a size and a reversing to the initial states.

### Operation

A background image is moved when you drag on the center of the image (The cursor is ). It is resized when you drag on the edge of the image (The cursor is or ), and it is resized proportionally when you drag on the corner of the image (The cursor is or ).

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