Why not just use the keyboard shortcut ALT+N (Insert Ribbon), followed by B (Page break)?
If you want to explore the Insert Ribbon page break is in the first control group, which is the Pages control group.
Brian - Windows 10 Home, 64-Bit, Version 1803, Build 17134
A great deal of intelligence can be invested in ignorance when the need for illusion is deep.
~ Saul Bellow, To Jerusalem and Back