(define-key map "+" 'notmuch-search-add-tag)
(define-key map "-" 'notmuch-search-remove-tag)
(define-key map "<" 'beginning-of-buffer)
(define-key map "+" 'notmuch-search-add-tag)
(define-key map "-" 'notmuch-search-remove-tag)
(define-key map "<" 'beginning-of-buffer)