When you type a function into a cell then press Ctrl-Shift-A you will see a list of argument names for the function appear. I wrote two macros that do something more useful.
If you enter just the name of the function (with no arguments) in a cell you will see a number appear. It is the register id of the function.
If you select the cell with this number and hit Ctrl-Shift-B then the cell contents will be replace by the function called with its default arguments.
If you press Ctrl-Shift-C then the default arguments will be placed in the cells below the function and the function will now refer to these cells.
Let me know if you think I should write a Ctrl-Shift-D that creates two columns. The first column would be the name of each argument and the second column would be their default value. It would also define names for the arguments and use those in the function call instead of cell references.

I’ve just committed some changes that only work in VS2019. If you want to stay with VS2017 you will need to checkout that tag, git checkout VS2017

I am using the inline variables feature of C++17 instead of Meyer singletons.