[Info-vax] EDT supporting more than 22 lines, where is it?

[Slo]

Where is the EDT version that allows more than 22 lines? I don't see it on OpenVMS V8.4-2L1. Confused...

FreeXP1>sh sys
OpenVMS V8.4-2L1  on node FREEXP   23-NOV-2021 18:07:10.80   Uptime  0 00:08:25
... 
FreeXP1>show terminal
Terminal: _OPA0:      Device_Type: VT200_Series  Owner: FREEXP_1
   Input:    9600     LFfill:  0      Width: 114      Parity: None
   Output:   9600     CRfill:  0      Page:   40
...

$ EDIT/EDT 
*sho ver
V3.12-04               

*help set lines
Format: SET LINES n
where n is the number of lines to use.  n must be between 1 and 22.  By
default, n is set to 22 lines.  If the cursor limits are larger than n-1
they are reduced to n-1.  See SET CURSOR.

*set lines 38
Numeric value illegal
*