Good idea! And you’re not the first to ask for it!
Our challenge is that there is no API in EA to get a diagram in a form which we can manipulate – it’s just a big bitmap. We can’t even tell how big.
BUT
I have asked the Sparx dev team to make their re-size and page-split function available via the API, and, for once, they were quite encouraging.
I’ve looked at manipulating the diagram objects directly, but this is a HUGE task, as we’d be replicating loads of EA diagram function, so we’re all going to have to wait for Sparx to produce new APIs.