How to remove or change my lockscreen message?

[AC Question]

I have an htc 10 , and i figured out how to put a lockscreen message a month ago, but now ive forgotten how i did it , i really want to change the message ,and i cant seem to do anything . Anybody help me?

 

[Rukbat]

Settings/Lockscreen. There are 2 places, message and owner info.