Dave
To add the 'header detail' under the "detail column" you have to rebuild the
FRAME column.
select the header cell 'frame'. In the upper right corner of your screen shot, just to the right of 'Records by Rows' is the 'header options' tab, click that and select 'delete selected cell'
now do the same for the 'detail column'
you will need to change the location of the header detail column. You do this back at the 'scheme settings tab'. Under the 'Schedule Fields' is a list of all the parameters in your schedule. The order in which they appear in the schedule is top to bottom > becomes > left to right. On the left hand side there is an up and down arrow. grab that arrow next to "header detail" and slide it up until it is under the parameter for 'sill', click OK
Now, using the shift key, select the cells for MATL / EL / GLZ / Jamb / Sill / Header. Again go back up to the 'header options' but this time select
insert header above cell. You can rename the header as needed.
Now select Jamb / Sill / Header and again insert a header......Done
Dave
AC 19-26 Windows 10 64 bit, Dell Prercision 7820, Xeon Silver 2414R ( 12 Cores), 64 GB Ram, Quadro RTX 4000 8GB