## BkImg (Background images)

An image file can be displayed on 3D view as a background image.

### Loading Background image

Click [Load] at left top of 3D view or button of [Disp > Background image] in View header. You can specify a file-pass for a background image.

Load
  It loads a background image.
View
  It displays the background image specified by [Load].

Click [OK], an image file is displayed on 3D view.

### Display option

X
  It cancels the setting of a background image.
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

The following operations on a background image in a view modify the placement.

Move | Drag the center of the image.
Change an aspect | Drag the edge of the image.
Resize | Drag the corner point of the image.
Rotate | Drag the outer arrow of the image.

### Switch show/hide

The background image can be switch showing or hiding with checking [Disp > BkImg] in View header.