1 – 9	On the search page: open that book. On a book: open that metric group (1–8).
/	Focus the search box.
← →	Inside a group: previous or next group.
Esc	Close a window, leave the search box, or go back.
B	Back to search from a book.
N P	Next or previous page of search results.
J C	Download the current book's metrics as JSON or CSV.
U	Paste or upload your own text.
?	Show this list.