I have an InDesign document ready to export but I'm having trouble with the layout of the spreads based on the exporting properties. I did not build this file and exporting has been most challenging.
Most spreads are built of 2 single pages, but sometimes we have a single page that should show as the entire spread. Currently when I export and view as spread layouts, I'm seeing 3 pages when there is a large spread. What setting do I need to turn on/off to fix this issue?
There are a couple of options, but what sort of export are you doing? It could influence which is the better choice.
Keep the spreads and fudge the width for the 2nd page adjacent to the wide page. Use the Page Tool to Alt/Option drag to resize both pages. If you've got a 3 pica margin, trim a pica off of the wide page and shrink the width of the other page to only be 2 picas wide. If your pages have margins set, you'll need to go to File > Document Setup to turn off the margin to let you resize the page to less than the set margin.
If you have the in5 plugin or the free trial of it, you can use the Merge Pages script that comes with it. It'll create a new file with merged single pages from your spreads. So you may want to first do the step above before merging or merge all your spreads and then create your wide pages. Then when you export, they'll look like spreads, but they are single pages--so make sure to export it as Pages and not Spreads.