Ben, Please utilize the -geometry option as Igor says.
Perhaps you are placing your monitors like the following figure (fixed-width fonts are assumed). +-----------+--------------+ | | | | | | | | | +-----------+ | | | monitor B | | | | | monitor A | | | | | +-----------+--------------+ Cygwin/X maps the top-left corner of the whole virtual screen to (0, 0) on which new windows are to be placed. As long as you specify -multimonitors in those situations, you should accept this result and make use of -display option. Of course proposals of better ways of mapping would be appreciated. The true problem is that no matter if -multimonitors is specified or not, some code assume the top-left corner of the whole virtual screen is (0, 0). Therefore users will accidentally lose their new windows though they are willing to use only the primary monitor. Takuma Murakami