[nhmuse]

Hello -- Mac OSx Sigil user, exporting from InDesign CS5.

What is the purpose of the page_template.xpgt file? Is it necessary for any of the readers? Is it important? Does it cause problems for some readers?

I am exploring an epub generated by the book printer from my InDesign document, and in Sigil, there is a page_template.xpgt file.

When I open the epub in ADE on my computer, the book appears as 2 columns.
When I resize the ADE window down to a narrower width, the book appears as one column. I think the .xpgt file is what allows this behavior.

The rest of this question has to do with the appearance of the size of the book's cover image, and is the reason I am asking about the .xpgt.

On my own, I am creating my first epub exported from InDesign CS5, then opening it in Sigil to fine tune. (I have a solid understanding of xhtml and css.)

I have been reading Liz Castro's Epub book, regarding the size of the cover image, she recommended adding style="width:100%" to the cover html to make it fit the width of any device window, but when I did that, the cover image in ADE on my Mac is huge and fuzzy. Would I fix this by adding a page_template.xpgt file?

Or is there a better way to control the width of the cover image for various devices?

thank you!