Libre writer is rendering fonts much smaller

HI all:
I’ve been using Libre office writer for years on LInux with no problems - and like the program very much, but here’s a new development.
When I now open text files - all having been created with LO Writer, it now renders the font size much smaller than the size that was set.
Is there a setting for this OR is this just a glitch. I’ve looked at every setting I’m familiar with and to no avail.
I’m running 2 of my machines with PC Linux OS and it’s doing the same on both machines.
Thanks for replies

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