A small fix in Axure page style settings
Axure lets you control the page alignment on your browser screen. It is always recommended to center the prototype to maintain a sense of balance. Otherwise, for users with large screen resolutions, the entire layout will be tucked in the left corner.
Alignment is set by default in Axure to left align. See below how to set it to center alignment:
Changes you will make on the default page (as shown above) will affect all pages in your prototype.