> 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-spy-networks/message-editor/message-signals/message-signal-type-digital.md).

# Message Signal Type Digital

Setup a digital signal (1/0, on/off, true/false, etc) by setting the [Signal Type](/vspy-3-documentation/vehicle-spy-main-menus/main-menu-spy-networks/message-editor/message-signals/message-signal-type.md) pulldown to **Digital** in the Edit Signal dialog (Figure 1).

![Figure 1: Use the Edit Signal dialog to define a digital signal in a message.](https://3170208387-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FL6lcovCpkhoS9uTOFtEp%2Fuploads%2FYSkUqqw3JwwAdDaqr6ci%2Fspyindecodedigital.gif?alt=media\&token=e1c89865-a422-47f7-a736-d87d57483a4e)

The Start [Bit Position or Byte:Bit](/vspy-3-documentation/vehicle-spy-main-menus/main-menu-spy-networks/message-editor/message-signals/understanding-bit-and-byte-bit-positions.md) identifies where the signal is in the message. The signal position can also be changed by just dragging the blue bit around in the [Signals in Message](/vspy-3-documentation/vehicle-spy-main-menus/main-menu-spy-networks/message-editor/message-signals.md) area. Digital signals are always 1 bit long, so the Length is always fixed at this value.

The signal's [Format](/vspy-3-documentation/vehicle-spy-main-menus/main-menu-spy-networks/message-editor/message-signals/message-signal-format-and-units.md) is selected from a pulldown list at the bottom of the dialog. If the list does not have the format desired (such as Right/Left), type in desired format that corresponds with binary 1/0.


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