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-rw-r--r--doc/sphinx/proof-engine/vernacular-commands.rst14
1 files changed, 14 insertions, 0 deletions
diff --git a/doc/sphinx/proof-engine/vernacular-commands.rst b/doc/sphinx/proof-engine/vernacular-commands.rst
index 3e8dd25ee0..e207a072cc 100644
--- a/doc/sphinx/proof-engine/vernacular-commands.rst
+++ b/doc/sphinx/proof-engine/vernacular-commands.rst
@@ -510,6 +510,20 @@ Requests to the environment
.. seealso:: Section :ref:`locating-notations`
+.. _printing-flags:
+
+Printing flags
+-------------------------------
+
+.. flag:: Fast Name Printing
+
+ When turned on, |Coq| uses an asymptotically faster algorithm for the
+ generation of unambiguous names of bound variables while printing terms.
+ While faster, it is also less clever and results in a typically less elegant
+ display, e.g. it will generate more names rather than reusing certain names
+ across subterms. This flag is not enabled by default, because as Ltac
+ observes bound names, turning it on can break existing proof scripts.
+
.. _loading-files: