Help with Dev-C++ 4.9.9.2

I use Dec-C++ 4.9.9.2
Is there any way that I can add the number for each and every line/row in the source code? It makes so much easier to debug/find things.

And also when I do the tutorial, I always have to add (system ("pause");) at the end to make the program works, I get lazy sometimes, so can I change something of Dec C++, that make Dec understand return 0;
Tools, Editor Options, Display tab. Check the Line Numbers box.
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