I loaded LR onto a new laptop and the font size in the identity plate is so large (87) that the words Library, Develop, etc run off the side and I cannot see Slideshow, Book, etc. I tried to edit the Identity Plate setup and change the font size, but it won't change. I select a smaller font and then click OK, but it reverts to the large font size. Any suggestions?
You can reset the Lightroom Preferences back to default and see if that helps.
For resetting Preferences, please refer: Preference file and other file locations | Lightroom CC and 6
Let us know if that helps.