A 'Fixed Pixel Preview' in Flexitive is a preview page displaying the Fixed size designs you've built in Flexitive. In the Fixed Pixel Previews, you'll be able to see all fixed sizes, including IAB, 'Other' and Social sizes.
Designs in a fixed pixel preview are sorted by their category. Using the tabs in the top left corner of the preview page, you'll be able to navigate to the different categories.
To create a Fixed Pixel Preview in Flexitive, open the Publish panel on the right-hand side of the editor, and open the Preview tab. You can then select the Fixed Sizes you'd like to preview, and then click 'Preview Design' at the bottom of the panel.
As with any preview in Flexitive, Fixed Pixel Previews are updated in real time when you make changes to your designs, so you'll always see the most up to date version of the design. The URL for a Fixed Pixel Preview can be viewed by anyone, whether they're a Flexitive user or not.