LG 42PM4700 Owner's Manual page 196

Option
History
Effect
Play
Setup
✎ Supported format in MemoCaster
Resolution: Maximum 1920 x 1080
File Size: Up to 2MB
Supported format: JPG, JPEG, JPE (Not case sensitive)
The area where text will be shown, Enter your message.
Set the background color, font color, and font size.
Import the text recently used.
Add animation or LED effect to the content you created.
Set the start time, end time or weekly repeat of the memo to
be displayed.