So I have a puzzle here that my Google-Foo is insufficient to handle. I've written my dissertation in Lyx with one master-document and a pile of child-documents for each important chapter or logical section. For the professor review it needs to be double spaced on A4 paper with nice margins for writing notes in.
My problem is that I would also like to make a personal copy ,and one for my family that looks more like a book and not a book report. To that end I'd like to set the paper size to B5, the spacing to single, and to jigger the margins. My first attempt to achieve this was copying the master document to a new file name and changing the desired document settings. This worked moderately well but there was some garbage in the figures. Specifically the figures didn't want to fit and ended up at the end of the chapters. Trying to trouble shoot this problem I got to the logs where latex/lyx was complaining about having two master-documents.
I then abandoned that line of enquiry and tried making a B5 sized wrapper document for my A4 document and making the A4 Document into a child of the wrapper. This resulted in copious errors as latex complained about not allowing nested includes. Which sent me to google and eventually here.
I've looked at the posted similar questions which seem most interested in changing the content of the document. Which is not what I want to do. I emphatically want the format to change and not the content.
Bonus Question: I'm happy with slightly reducing the size of any offending figure floats in both versions of my text in order to fit the smaller, but is there a cool way to problematically state that all .pngs in the document must be narrower than a specified width? (Of course things hard-coded to a smaller width should not grow to the specified width.)
Thanks for any pointers.