hi,
configuration can only set the graphics and sound, in the readme is not explained how. can not read the text, especially for me, i do not know English well.

can you give me a simple explanation for gabriel knight 2 and 3

thank you

Check this thread for GK 2 (as there are no official subtitles) - http://www.gog.com/forum/gabriel_knight_series/q_does_gabriel_knight_2_the_beast_within_feature_subtitles/page1

For GK 3 - run the game, right-clicking anywhere on the screen will reveal the control panel. Clicking on the tool icon (next to the question mark icon) provides access to options. Then click on Advanced options -> Game options -> Captions (yes, captions are subtitles).