=====Reference image=====

You can load a reference image of the object you want to capture to adjust the position of the telescope and the rotation of the camera. This is very useful to continue a sequence over many night if you cannot use plate-solving.

You can adjust the display threshold and the color of the reference image in the [[preferences#preview|preview]] options. \\
Normally you want the threshold to display only the stars from the reference image. 
{{:en:documentation:refimagesetting.png|}}

To load the image use the menu **File / Open reference image**

Then start a preview loop, it show the new image over the reference.  

{{:en:documentation:refimage.png|}}

You can now move the telescope or rotate the camera to match the reference.

When you are satisfied with the result you can remove the reference image from the menu **File / Clear reference image**

**Tips:**\\
To help to center the telescope open first the reference image with File / Open FITS file. Right click on the image and select "Resolve and slew to image center". After the telescope stop slewing process as above to adjust the rotation.