Latex submission template: keep figures to margin size? For submitting papers to Elsevier journals, they instruct you to prepare Latex files using the Elsarticle class. This class has huge margins (as other questions have also touched upon), to give space for reviewer comments, etc.

I have large, landscape figures which fill whole pages. Do I need to reduce the size of these figures, so that they fit within the margins, or am I ok to keep them a sensible size and assume that this will be sorted by the publisher if it is accepted at a later date?
I strongly advise complying with the formatting guidelines that you are provided.

Organizations like Elsevier give you a template an submission instructions for a reason, and in many cases the final formatted version will look nearly identical to a submission that follows their template. You can push your luck by violating the formatting guidelines, but this will make you look unprofessional and may annoy the editor and reviewers.  Do you really want to take that risk?

More to the point: most visual material can be readily organized into a number of formats.  Are you certain that you must have massive landscape images?