compare-windows-get-window-function

compare-windows-get-window-function is a variable defined in `compare-w.el'.
Its value is

compare-windows-get-recent-window

• This variable may be risky if used as a file-local variable.

Documentation:
Function that provides the window to compare with.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 25.0 of Emacs.