Shortcut to update Layout reference file

Simon-I had been a PC user since the MS-DOS screen days, (how is that for dating myself) but converted all to Mac a few years ago. Initially I thought I made a bad mistake in terms of SU, but the SU 2015 (?) version vastly improved the interface for the Mac users. There are distinct differences between the Mac and PC versions. I would not go back to PC except under extreme duress. Brian

its here on PC under file dropdown.