I am using FM Pro 12, OSX 10.8.3

I have used several layouts since FM Pro 5 (I think). I upgraded to 7, 9, and now v 12.

On one layout I just noticed that a field is now appearing in scientific format, not just as a number. It used to appear ok. Since it exists on other layouts ok I tried to see what the difference was in the inspector, and I could not see any difference. I copied the field from another layout where it was ok but when viewed on this layout, it too, appeared in scientific form. How can I get it back to the way it was?

Is the font the same? It sounds like the field is not wide enough to display the content. It can also be that the field is not the type you want it to be. i.e. text and it is number. Click in the field and see if it changes.

Check the number formatting for the field on the Inspector "Data" tab. The "General" setting will use scientific notation for very large and very small numbers, even if the field is large enough to display the number in non-scientific notation. Try using one of the other number format settings such as "As entered" or "Decimal."