If you just need to quickly export a single spec sheet, you can do it from within an item. Here's how...
Step 1: Open the item, and click on the file folder image in the upper right-hand corner of the item page.
Step 2: Select what you would like to include on the Spec Sheet. Then click "Export PDF".
Step 3: Click on the red link to download your spec sheets.
Step 4: You will then need to save the export to a folder on your computer.