I cant set my printing size 2100mm width 1485mm height A4 Portrait

[aadiyatyunus]

I am not getting size for paper printing in canon lbp 2900

size:2100 mm width
1485 mm Height

A4 Portrait(A4 paper half size)

 

[macleonard]

I am not getting size for paper printing in canon lbp 2900

size:2100 mm width
1485 mm Height

A4 Portrait(A4 paper half size)

in afterbuites