===== Build 3D View =====
Femtoscan allows you to plot three-dimensional images of the surface. To do this call up menu command  [[меню_операции|Operations]] -> **Build 3D View** or click the button on the tool bar:

{{:en:processing:en_3d_1.jpg|}}.

A lot of operations can be done with resulting three-dimensional object:

  * The surface can be rotated around vertical axis. To do this do left click and move the mouse right or left holding down the left mouse button.
  * To zoom in or out do a left mouse click and move cursor up or down holding down the left mouse button.
  * It is possible to change a vertical scale of image (Z axis). To do this hold down the left mouse button and move cursor up or down while holding down the Z key.
  * The surface can be rotated around horizontal axis parallel to screen plane (Y axis) or perpendicular to screen plane (X axis). To do this hold down the **Ctrl** key and the left mouse button then move cursor up-down or right-left correspondingly.

{{:processing:3d_2.jpg|}}

  * The image can be moved by moving the cursor with the **Shift** key held down.
  * If **Highlighted** is active in menu [[view|View]] (appears when 3D window is selected) the surface is highlighted. It is possible to change position of light source which can greatly affect clearness of the image. Move the mouse holding down the **Shift** key, the **Ctrl** key and the left mouse key to move the light source.
  * Besides the possibility of changing position of the light source Femtoscan allows you to change optical properties of the light as well as of the surface. Usually it is not necessary but if you want to set up properties of the light check the [[3d_уравнение_освещенности|additional description]].
  * Right click on 3D image calls up [[3d_настройки|3D image preferences window]]. It can also be called up by menu command [[view|View]] -> **Preferences...**.
  * The program also allows you to record [[3d_video|fly-view videos]].