git: 56f49dd3a046 - releng/15.0 - vt.4: Document increasing scrollback size

The branch releng/15.0 has been updated by cperciva:

URL: https://cgit.FreeBSD.org/src/commit/?id=56f49dd3a0465767a54ecee91ba0deb4c7557656

commit 56f49dd3a0465767a54ecee91ba0deb4c7557656
Author:     Alexander Ziaee <ziaee@FreeBSD.org>
AuthorDate: 2025-11-21 17:40:56 +0000
Commit:     Colin Percival <cperciva@FreeBSD.org>
CommitDate: 2025-11-23 16:38:34 +0000

    vt.4: Document increasing scrollback size
    
    Approved by:    re (cperciva)
    MFC:                    immediately as 2 llms say this is impossible
    Reviewed by:            adrian, emaste
    Differential Revision:  https://reviews.freebsd.org/D53860
    
    (cherry picked from commit a8740ba860bfc35879f886b80b30327d0d3b16bd)
    (cherry picked from commit 2da71ee296add6c39e26e8b103dd24a12e8ce320)
---
 share/man/man4/vt.4 | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/share/man/man4/vt.4 b/share/man/man4/vt.4
index 21d69bf9d495..6176c8c3093e 100644
--- a/share/man/man4/vt.4
+++ b/share/man/man4/vt.4
@@ -25,7 +25,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd July 7, 2024
+.Dd November 21, 2025
 .Dt VT 4
 .Os
 .Sh NAME
@@ -352,6 +352,12 @@ Notification that the console bell has rung.
 .It Li hz Ta Tone that was requested in Hz.
 .El
 .Sh EXAMPLES
+To increase the scrollback buffer size to 22500 lines,
+add the following line to
+.Pa /etc/rc.conf :
+.Pp
+.Dl allscreens_flags="-h 22500"
+.Pp
 This example changes the default color of normal text to green on a
 black background, or black on a green background when reversed.
 Note that white space cannot be used inside the attribute string
@@ -414,6 +420,7 @@ at boot:
 .Xr getty 8 ,
 .Xr kldload 8 ,
 .Xr moused 8 ,
+.Xr vidcontrol 8 ,
 .Xr vtfontcvt 8
 .Sh HISTORY
 The