Save Layout to Disk, to share with someone else?

Not really. As wolfgang explained, desktop layouts are currently too complex to be shared, and Logos has not yet built a document type for them. However, there's kind of a small workaround. The web app ( https://app.logos.com ) has much less features and configuration possibilities than the desktop. There are no layouts as we know them in the web app, it saves the status of the session in a very long URL. I made a simple layout that could be desribed as follows:

NIV 2011 is open in left tab to Isaiah 65:17 with RI showing, BWS is open in the right tab to the Hebrew word “rejoice”. In the left tab, Moody Classics Complete Set is behind the NIV and is located at the title page of Bunyan’s “Pilgrim’s Progress”.

it looks like this:

https://app.logos.com/books/LLS%3ANIV2011/references/bible%2Bniv.23.65.17?tile=left&zzls=2eMKcZcKOQW7DgjAQRcOvMhLCuygmIRTCkx1iw4vCql1WLAwZEgvDh3bDhw4IRcK%2BBDvCpMOeK8OXw4FIwojCpmI3w7PDvxvCvcOpw6HChMOkwqTDkVBmCVjCoVHCrcKsXcKbwrYVwrpyUH7DtyDDtl7CnhBKTx0mw7DDkyFdwqDDrMOBwpI0JH3CnMOzIsKEJAbDgjdawrTCkQRWd8KyQsOHw47ChioYw50QHsKQUMOvH8OMcB1uw4NvbEnCnD9HwrnDgsOoTsOVw47CpQ3Cpi%2FDiEvDtShJw5bCjcKPw6vCnzzDu3jCk8Ovwow5OsK2w5l8TWbCq8OlwoJPw7k0L3g%2Bw6cLw7bDsjtmRcKNw6nCjBfDo8O3wp4SwoXCh8O%2Fwo48C2Ebw65mRGgf

Even after totally changing what the web app shows: When I click that long URL the web app will open and look quite the same, just like a saved layout would work - and I believe this is shareable with others: When you click the URL it will look much the same for you (depending on the books and features you own - and the position in the Moody book is not saved for me).

I think this is a good workaround to share simple layouts with other users.