Rendering too large, how do you measure page and what is the limit.

[Acorn]

Have a page that I have a number of bit maps that are quite large, I get the attached message when I try to preview or publish page. How can I measure the capacity of the page and what is the size limit please.
Terry

Use Options > Page Size and enter 1,000,000.
Xara complains and says 75,600px wide or high is its limit.

I have no idea how it handles a picture's sizing.

Acorn