calibre User Manual, Release 2.57.1
books in that category. So for example if the books by Isaac Asimov have an average of four stars, the icon for Isaac
Asimov in the Tag Browserwill be 4/5th colored. You can hover yourmouse over the icon to see the average rating.
The outer-level items in the tag browser, such as Authors and Series, are called categories. You can create your
own categories, called User Categories, which are useful for organizing items. For example, you can use the User
Categories Editor (click Alter Tag Browser->Manage authors, series, etc->Manage User Categories)to create a user
category called Favorite Authors, then put the items for your favorites into the category. User categories can have
sub-categories. For example, the user category Favorites.Authors is a sub-category of Favorites. You might also have
Favorites.Series, in which case there will be two sub-categories under Favorites. Sub-categories can be created by
right-clicking on a user category,choosing “Add sub-category to ...”, and entering the sub-category name; or by using
the User Categories Editorby entering names like the Favorites example above.
Youcan search user categories in the same way as built-incategories, by clicking on them. There are four different searches cycled throughby clicking:
1. “everything matching an itemin the category” indicatedby a single green plus sign.
2. “everything matching an itemin the category or its sub-categories” indicated by two green plus signs.
3. “everything not matching an item in the category” shown by a single red minus sign.
4. “everything not matching an item in the category or its sub-categories” shown by two red minus signs.
It is also possible to create hierarchies inside some of the text categories such as tags, series, and custom columns.
These hierarchies show with the small triangle, permitting the sub-items to be hidden. To use hierarchies of items in
acategory, you must ﬁrst go to Preferences->Look & Feel and enter the category name(s) into the “Categories with
hierarchical items” box. Once this is done, items in that category that contain periods will be shown using the small
triangle. For example, assume you create a custom column called “Genre” and indicate that it contains hierarchical
items. Once done, items such as Mystery.Thriller and Mystery.English willdisplay as Mystery with the small triangle
next to it. Clicking onthe triangle will show Thriller and English as sub-items. SeeManagingsubgroupsofbooks,for
Hierarchical items (items with children) use the same four ‘click-on’ searches as user categories. Items that do not
have children use two ofthe searches: “everything matching” and “everything not matching”.
You can drag and drop items in the Tag browser onto user categories to add them to that category. If the source is a
user category, holding the shift key while dragging will move the item to the new category. You can also drag and
drop books from the book list onto items in the Tag Browser; dropping a book on an item causes that item to be
automatically applied to the dropped books. For example, dragging a book onto Isaac Asimov will set the author of
that book to Isaac Asimov. Dropping it onto the tag History will addthe tag History to the book’s tags.
There is a search bar at the top of the Tag Browser that allows you to easily ﬁnd any item in the Tag Browser. In
addition,you can right click on any item and choose one of several operations. Some examples are to hide it, rename
it, or open a “Manage x” dialog that allows you to manage items of that kind. For example, the “Manage Authors”
dialog allows you to rename authors and control how their names are sorted.
You can control how items are sorted in the Tag browser via the Alter Tag Browser button at the bottom of the Tag
Browser. You can choose to sort by name,average rating or popularity(popularityis the number of books with anitem
in yourlibrary; for example, the popularityof Isaac Asimov is the numberof books in your library by Isaac Asimov).
1.1. The Graphical User Interface