Photocopying 1 portrait A4 page onto 2 A5 pages onto A4 landscape?

[AuntieMaggie]

Anyone know how to photocopy a document that is on A4 so that I have 2 pages on one page?

Think you've answered it yourself, if the photocopier allows you to reduce onto A5 sheets...

I assume you are wanting to do something like a menu or event programme and plan to reduce size so copying on A4 will produce sufficient copies at lower cost than on A4 size (or that the spacing would make it appear to have lots of 'white space' so compressing onto A5 size is a cosmetic change).