JVC Black Sapphire SL42B-C User Manual page 47

Name Input
The Name Input feature allows you to add a label name on an input
source.
1. Press MENU, select Setup and Press OK on Input Source to select
which input from the list that you want to name
2. Then, press OK on Input Labels to select from a list, or choose
CUSTOM on the list, then press OK on the box below Custom to
type in a desired name
Advanced TV Settings – Setup Menu