Can I change this setting or is it a factory pre set thing?I wonder if this is caused by the TruMotion setting being turned on due to the picture preset used? I'm assuming it's still the case that the default preset on LG TVs is their awful "Vivid" mode, which turns on all the motion processing garbage they have built into the TV and might possibly be what's causing the issues the OP is reporting.
Thank you very much. I really appreciate you taking time to help meYes, you can change them as they're all in the Picture area of the TV settings. Changing the picture mode to either "ISF Expert (Dark Room)" or "ISF Expert (Bright Room)" will probably help almost immediately.
Might be worth taking a look at this article on RTINGS, as it's probably not million miles away from the TV model you have, which outlines some settings you might want to consider adjusting (I turned TruMotion off straight away, for what that's worth): LG UM7300 Calibration Settings
I appreciate this is new for you and it can be very confusing but it's worth taking some time to absorb the info as it will make using the TV a lot better in the long run. Good luck!