Excel Page Size

I have made several worksheets.. but they end up needing to be zoomed to 39% so each can be viewed as full width of my laptop screen.
On my tablet I cant zoom to match so I get split screen pictures of the page.

So .. other than going through the sheet and reducing every cell width by (say) 75% .. is there a way to change the page size ?

I have set the print size so the page prints ok.. so ???

Thanks

Andrew