According to feedback we have collected, we found this issue usually happens on the desktop side.
A. Desktops usually have multiple VGA output connectors with two types of interfaces. For example, one DVI and one D-sub, or one Displayport and one D-sub. When you encounter this issue, please confirm that the connector used for your main monitor is following the rules:
1. If your connectors are DVI and D-sub: please use the DVI connector to connect your main monitor, and press "Win key"+P to open display types (4 types shown usually), then select the leftmost option, "Computer only," as shown below. After you have done this, use the iPad to connect to your computer again, and it should display your extended screen on your iPad.
2. If your connectors are Displayport and DVI (or D-sub), please use Displayport to connect your main monitor, and press "Win key"+P to open the display types (4 types shown usually), then select the leftmost item ("Computer only") as shown below. After you have done this, use the iPad to connect to your computer again and it should display your extended screen on your iPad.
B. If your Win7 is running under a Mac computer, please try the following steps to verify if Splashtop XDisplay can be used on your computer. (This way also applicable to identify any environment.)
1. Connect a second monitor to another VGA connector interface.
2. Right mouse-click on the desktop screen, and select "Screen Resolution" to open a window like below.
3. Press "Win key(Command key)"+P, and select the third item ("Extend"). If there is still only one monitor that can be emulated like above, it means Splashtop XDisplay can't be used on your computer.
It may help to update the display driver for your computer.
Please enter a Comment below and tell us your connector types and connection-related settings, if you still only get the main screen.