> For the complete documentation index, see [llms.txt](https://docs.intrepidcs.com/vspy-3-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.intrepidcs.com/vspy-3-documentation/vehicle-spy-main-menus/main-menu-gmlan/gm-cgi-bus.md).

# GM CGI Bus

GM CGI Bus view is used for viewing CGI display data in Vehicle Spy. This view consists of 3 tabs. The first tab, Screen, is shown in Figure 1. This is the tab shows the image encoded in the selected message.

![Figure 1: GM CGI Bus Screen](/files/KzKKg7fc4jo7vYK2kq3T)

The Setup tab (Figure 2) is where the CGI message with Screen data is selected. This message must be defined in the receive table of the [Messages Editor](/vspy-3-documentation/vehicle-spy-main-menus/main-menu-spy-networks/message-editor.md). The next option to setup is the size of the screen. The Width and Height are entered in the Screen Size and is entered in Pixel units.

![Figure 2: GM CGI Bus Setup](/files/kwA68goziyXegjPsuExx)

The last tab, Message Details (Figure 3), shows the start row and pixel count of the incoming graphic.

![Figure 3: GM CGI Bus Message Details](/files/f4gpxjVLsOFHamnG4lNm)


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