Beamer: mark slide as `[fragile]` if header has `fragile` class.

Closes #2119.

1 files changed, 10 insertions, 0 deletions

diff --git a/README b/README
index b4f037efa..4225da89e 100644
--- a/README
+++ b/README
@@ -3159,6 +3159,16 @@ To show the notes window, press `s` while viewing the presentation.
 Notes are not yet supported for other slide formats, but the notes
 will not appear on the slides themselves.
 
+Marking frames "fragile" in beamer
+----------------------------------
+
+Sometimes it is necessary to add the LaTeX `[fragile]` option to
+a frame in beamer (for example, when using the `minted` environment).
+This can be forced by adding the `fragile` class to the header
+introducing the slide:
+
+    # Fragile slide {.fragile}
+
 EPUB Metadata
 =============