As dual monitors become more popular, we are finding a very small number of dual monitor users who have a problem where the layers and groups cannot be clicked on or off in the MapGuide legend .
Most users will put the "primary" monitor on the left, probably connected to the DVI digital port on their video card and put the "secondary" monitor on the right, most likely connected to an analog port on their video card. These typical users don't seem to have any problems.
However, a minority of dual monitor users want their "primary" monitor on the right, probably so that monitor can use their video card's single DVI digital output. Then the "secondary" monitor ends up on the left using the video card's analog output. As far as we can tell, this "primary" on the right and "secondary" on the left situation is the only configuration that has the problem with being unable to click layers on and off on MapGuide maps on one of the monitors.
When this configuration fails, the easy solution is to use the other display for MapGuide, simply by dragging the map to the other display. Of course, this gets frustrating and we want it to work all the time.
While we don't fully understand exactly what settings are needed to make MapGuide layers selectable on either monitor, it is possible to adjust Windows Display Properties Settings to arrange things so MapGuide layer selection works on both monitors. We haven't documented or tested proven steps for adjusting the Windows monitor settings. In lieu of specific instructions, we've included screen shots below of settings that work when the right monitor is primary on the digital interface and the left monitor is secondary on the analog interface. If you want your monitors "backwards" unlike most users, then maybe these settings will help you to get MapGuide to work for you on both of your monitors. Be aware that even with this setup, when the map is on the right monitor, there is another bug where the yellow map tips appear along the right edge of the left monitor but this usually isn't too bothersome.
The problem can also occur with dual DVI video card connections. In this case, it's not as clear which port is connected as "primary" or "secondary" as they are physically the same.
If you get this figured out and can explain a more direct solution, let us know at 
| Analog connection - left monitor | Digital connection- right monitor |
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