Magazine Layout problem

Hi, I am new to Coreldraw and have a problem which is driving me crazy, I know there will be a simple soloution so I hope you can help?

I am designing an A4 magazine and want some illustration to be presented across 2 pages.

The problem I have is the pages will be published in seperate A4 PDF's, how do I split the page?

Also with a 3mm bleed, how is this done when i split the page for A4 PDF?

Hope that makes sense?

 

Also, what are the best PDFsettings for magazine printing in CMYK?

 

Many thanks

 

John