The Export dialog provides a streamlined approach to exporting your publication or current page/spread to a common image file format by giving you quick access to standard export settings. The dialog also lets you publish as PDF.
From the dialog, a preview of what will be exported can be displayed, which you can zoom and pan to inspect the effect of your choices.
Your choice of file format determines which other settings are presented on the dialog.
For descriptions of the complete range of settings and their availability by format, see Export Settings.