The window of options is showed on figure:
    
Adaptive monochrome filtration. The adaptive transformation to the monochrome image is carried out, using the size of the block in pixels, which is mentioned below. The given flag is simply necessary for the large images, for example 1600 on 1200. For the small images it is not used automatically, but you can independently uncheck it. Then the threshold meaning of brightness set in the main window.
    
Use increase. It is necessary to apply in cases, when you have very small image, and though the code is seen precisely - he does not recognize.
    
Size cells. Need on encode mode.
    
There is an item of a choice of the current language and choice of the active recognizing module, about which it is possible to see the information by the appropriate button. Also there is a button restoring meanings by default.
    
The options are stored in a file config.dat.