Shortcut to toggle absolute $

[lsmft]

Is there a keyboard shortcut that can change the formula in a given cell from relative to absolute, or do I need to manually put $ marks in each formula?
I think I saw lately that a combination of an "F#" key and some other key would do this.

[VBA Noob]

In the formula bar press F4.

VBA Noob

[lsmft]

Thank you for your help