From a Home screen, navigate: LG > Messaging .
These instructions apply to Standard mode only.
If Messaging is not set as your default messaging app, a pop-up appears when you click the icon; tap YES to set as default.
If presented with a Messaging permissions screen, tap ALLOW.
Tap the Menu icon (located in the upper-right).
Tap Link & send.
Tap the Signature switch to turn on or off .
A signature is automatically attached to each sent text message when switch is in on position.
Edit or enter the preferred signature then tap SAVE.