Parameters

What can I do here?
You can fine tune Radius and  Smoothing parameters to get the best output image. More>>
You can exclude some images from processing by removing  the red mark against the image in the upper list.
Click on output  listing to view all available output images in the lower list to choose the best one. 

What do I do next?
Press Run button to merge selected images with the current parameters and get resulting image.
Press Add to queue button to process selected images later in batch mode.  More >>
Switch to Retouching tab to manually fix defects of automatic processing.
Switch to Saving tab  to save the output image to disk, email or print it.

Options:

Radius is the most important parameter for processing. It defines the size of area around each point which is used to define if the point is focused or not.

If your image has fine details, most probably low level of radius (3-6)  would give the best results.

If the image consists mostly of the coarse lines, then you should try higher values (10-15).

The Smoothing slider defines how the focused parts are combined. Low level produces sharper image, but transition areas may have some artifacts. High level of smoothing will result in a bit blurry image without visible transition areas.

Add dust map command let's you select and import file with the dust map. Use as a dust map command lets the program interpret the selected image as a dust map.