HP-12CP Programming - Multiple programs

[lvt]

So I currently have more than one program in my 12CP's memory, how can I delete a row (an instruction?) or remove an entire program?

For example I have the first program that is the 70 PI digits calculation code provided by the forum, the program occupies lines 001 to 071. Then I have other programs with different sizes after that.

Now I want to remove the second program that occupies lines 072 to 086. How to do that and what happens to the empty space between the remaining programs (if any?).

Thank you.