This tutorial will cover exporting images for the process blog from inDesign. To do this, you want to find the page that you need first. We're going to export two examples, one page and one spread. We're going to start with exporting just page 3.
Choose "File" -> "Export", when the export page asks us to name the document, it will fill in the current name of the document, and then you will put in "-page" after that name. Also, you want to make sure that its type is JPEG. Click "Save". Put in "3" for the "Range" and "100" for the "Resolution", and then choose "Export". That's all you need to do to export a page.
If you want to export a spread, choose "File" -> "Export". Make sure its type is JPEG again, put Resolution at 100, and click choose "Spreads" instead of "Pages". For the "Range", put in "2-3". Click "Export".
That's all you need to do to export images.