What Is the Blue Flashing Triangle on the Screen of My Garmin Edge?

If you see a flashing blue triangle that looks like the play symbol on the screen of your Edge® cycling computer, that is a reminder for you to start the activity timer to record your ride data. Once you start the activity, you will see a green triangle appear briefly, indicating the activity has started recording. See examples of this below:

To check for specific steps on the Timer Start Mode for your device, refer to the owner's manual.