# Part 5 - Setup Application Signals

### 1. Setup Application Signals:

To keep things organized, save your work and start a new Vehicle Spy file. (If you do not wish to build a new file then a finished file can be opened from the Examples tab in the Logon screen called "Tutorial 4 - Part 2".)\
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Open up the "Application Signals" view found under Scripting and Automation --> Application Signals. You can think of Application Signals as being like variables used in software programming. They can be set to different values or store different values for later use.\
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For this tutorial we need seven Application Signals to help control Playback function blocks. Click the "+" to make a new Application Signal. Enter "60EcuTrigger" for the description. Change the Signal Type to "Digital" and set the Format to "On/Off".\
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Repeat the previous steps for the other six ECU source IDs (10, 1A, 29, 40, 58, and 97) using the same naming convention.

![Figure 1: Adding and editing Application Signals.](https://2280262322-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FC3KyOmcYmM6ZVd3OQDa1%2Fuploads%2FTtGKOYR25rGZXcyhBGyQ%2FspyExample4Part5Pic1.jpeg?alt=media\&token=e2bee024-6bcf-43a1-b36f-b76230f7734d)