LG 86TR3PJ-B.AEUQ User Manual page 92

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Menu-Share
Click on the [Menu] window to generate a QR Code so that you can share your palette works to others.
Menu-Exit
Click will exit the [Palette] App. Be careful, current works will lose if you did not save.
[Clear]
Click to clear all content on current page.
[Undo]
Click to back to last step.
[Redo]
Click to recover a step.