TRMNL (OG)
The button on the back of the TRMNL (OG) device can serve many functions, but the most prominent is to force the device to refresh and advance to the next screen in your playlist.
Pressing the button wakes up your device and instructs it to connect to its server to fetch the next screen update.
This button has additional functions outlined in our special functions article.
TRMNL X
TRMNL X may be designed as an ambient dashboard device, but that doesn't mean you can't give it a little push (literally!) if you want to advance to the next screen in your playlist.
To get the next image, tap the center of the touchbar on the bottom:
Touchbar Extra Functionality
TRMNL X will store recent screens in memory, allowing you to go "back" and "forward" through saved screens, no network request required.
Touchbar Mode
By default, TRMNL X devices ship in Tap mode. However, in your Device Settings > Firmware you can change this gesture from tap to Swipe.
Touchbar Tap
Touching the left-side of the touchbar will go back to the previous screen.
Touching the right-side of the touchbar will go forward through saved screens.
Touchbar Swipe
You can swipe left to go back and swipe right to go forward.
Other Touchbar Functions
Recalibrating the Touchbar
If a "hold for 2s" feature like the Other Touchbar Functions above is triggering instantly, or any long-press function is treated like a quick press, these are signs you need to perform a re-calibration.
To recalibrate the touchbar, perform a soft reboot. Ensure you are not actively touching the touchbar during this process! The screen will flash a few times. Once completed, the touchbar will respond as expected.