A tip to get up and running with these display devices:
https://create.arduino.cc/projecthub/niftyjoeman/osepp-lcd-and-keypad-shield-d5b46e
After some struggle with Arduino IDE compiler errors:
/Arduino/libraries/LCDKeypad/LCDKeypad.h:18:1: error: expected class-name before '{' token
{
I arrived at the solution that one has to import the LCDKeypad.h library in this order:
#include "LiquidCrystal.h"
#include "LCDKeypad.h"
I concluded that the LCDKeypad.h library will not compile unless LiquidCrystal.h is included first in the code. I hope that this post saves someone else out there some pointless lost time. This kind of thing ought to be spelled out in the readme file IMHO.