Add a changelog entry.

diff --git a/doc/news/changes/minor/20231002Bangerth_2 b/doc/news/changes/minor/20231002Bangerth_2
index 70a0c16e764d9754b767d12831f26dc366f6a9e0..c4a95c4ce22bfe390145b9d89145e5174a4d5483 100644 (file)
--- a/doc/news/changes/minor/20231002Bangerth_2
+++ b/doc/news/changes/minor/20231002Bangerth_2
@@ -2,6 +2,8 @@ New: The new function AffineConstraints::add_constraint() adds an
 entire constraint all at once, rather than splitting the task across
 AffineConstraint::add_line(), multiple calls to
 AffineConstraint::add_entry(), and
-AffineConstraint::set_inhomogeneity().
+AffineConstraint::set_inhomogeneity(). The new function
+AffineConstraints::constrain_dof_to_zero() is a short-cut that adds a
+constraint that requires a specific degree of freedom to be zero.
 <br>
 (Wolfgang Bangerth, 2023/10/05)