Quote:
Originally Posted by hank
Got the "Formats" column back -- it did have the template code you mentioned.
I finally went to each of the four Libraries, and while each of them was open, went to Preferences for Calibre in the application menu, and reset all the columns to default.
After that all four libraries appeared consistent. Then I went to Preferences and re-enabled the Formats column from the list offered. Bingo -- all four libraries now display a Formats column.
This may be a clue; should the Preferences for Calibre control how all libraries appear? Or only affect whichever one is currently open?
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Columns are Per Library and are store inside
There are 2 types of Preferences (the Preferences screen usually sets both):
Per Library for things that do not (default config) exist in a library.like Columns, column Arrangements and of course: column data
User Preference which are stored in the Calibre Config folder (

remember to back this up if you make many changes from defaults)
This is where many GUI and Editor Preferences are stored, including assigned Device templates. This is also where Plugins and other customizations are kept.
Edit: Almost Forgot


If you Create a new library, there is a Copy Structure tickbox that will copy those (per Library) special settings over to the new one