I want to set the command line options for the linker in a C++
project in a .NET IDE

If I click on Project in the menu
and then on Properties a window comes up showing several Configuration Properties.

Under the Linker Tab, I can display the command line. How do I change its contents?

If you want to add new options, you can use the edit box in the Linker-Command Line dialog box.
If you want to change the existing options, they can be changed through the other linker options.
For e.g the /PDB:"Debug/CPP_Console.pdb" part of the linker command line can be changed at the Linker->Program Database File Creation field.