How do I change my 100 MHz/div+ (1000 MHz full span) on my 1705A

How do I change my 100 MHz/div+ (1000 MHz full span) on my 1705A

There are 4 locations for jumpers on the Main Board (A3) in the 1705A.
Strap across these pins with jumpers for a 500 MHz full span (50 MHz/div).
J3
J100
J101
J300