Is it possible to highlight and move large numbers of lines of functions in a workbook from one location to another?

In a regular spreadsheet, large blocks of cells can be moved or deleted. In Mathematica, I have such a block used to build a parametric model. Once the book becomes too large, I want to start another book or worksheet fresh with the same model. In a spread sheet, this is easy: highlight, copy, paste.

Does such a function exist within Mathematica? So far I can only do it one function at a time..