diff --git a/manual/edit.rst b/manual/edit.rst
index 0f86ed8e29..5ad66e7452 100644
--- a/manual/edit.rst
+++ b/manual/edit.rst
@@ -150,7 +150,7 @@ from the OPF file, saving you that chore. However, references in other places
 are not removed, you can use the Check Book tool to easily find and
 remove/replace them.
 
-Export/import of files
+Export of files
 ^^^^^^^^^^^^^^^^^^^^^^^^
 
 You can export a file from inside the book to somewhere else on your computer.
@@ -163,6 +163,14 @@ book, by right clicking on the file again and choosing :guilabel:`Replace with
 file...` which will allow you to replace the file in the book with
 the previously exported file.
 
+Adding new images/fonts/etc. or creating new blank files
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+You can add a new image, font, stylesheet, etc. from your computer into the
+book by clicking :guilabel:`File->New file`. This lets you either import a file
+by clicking the :guilabel:`Import resource file` button or create a new blank html file
+or stylesheet by simply entering the file name into the box for the new file.
+
 
 Search & Replace
 -------------------
diff --git a/src/calibre/gui2/tweak_book/file_list.py b/src/calibre/gui2/tweak_book/file_list.py
index 6fced37dfd..811110d3f3 100644
--- a/src/calibre/gui2/tweak_book/file_list.py
+++ b/src/calibre/gui2/tweak_book/file_list.py
@@ -616,6 +616,8 @@ class NewFileDialog(QDialog):  # {{{
         bb.rejected.connect(self.reject)
         self.imp_button = b = bb.addButton(_('Import resource file (image/font/etc.)'), bb.ActionRole)
         b.setIcon(QIcon(I('view-image.png')))
+        b.setToolTip(_('Import a file from your computer as a new'
+                       ' file into the book.'))
         b.clicked.connect(self.import_file)
 
         self.ok_button = bb.button(bb.Ok)