Hi,
with your spreadsheet open go to save as,then click on tools at your left
bottom, enter a password and check the box that says Read-only recommended
Hope this helps

"tstb" wrote:

How do I make my workbook read only to another user whilst I am making
changes. Why is the other user not getting a read only prompt, they are also
making changes causing save problems. I have not ticked the allow changes
by more than one user box in the tools menu.