Can you call a macro from another workbook

[mwatson]

It's just as the title says I have a workbook and I want to use a very large macro that calls other macro's but all this is based in another workbook.
Is this possbile or do I have to copy all the original macro's from the MASTER workbook in to the duplicate workbook and access it from there?

 

[mwatson]

So obvious!
Well done and thanks for your help