We introduce an interactive seismic viewer "OP" (developed in MATLAB platform), primary designated for detailed processing of selected events. Few examples of graphical outlook are presented (main display window, particle motion diagram, etc.), available tools are briefly described, uncommon special tools (simultaneous display of original and filtered signal or time-spatial correlation of seismogram components) are emphasized. Features of the viewer are discussed, some programming solutions are also mentioned., Petr Kolář., and Obsahuje bibliografii