What happened with the render as IMAGE SEQUENCE option in Vegas Pro 18? I can not find it anywhere. Followed the help instruction

From the File menu, choose Render As. The Render As dialog is displayed.

In the Name box, type the base file name you want to use for rendered images. Files will be numbered automatically using this file name.

In the Output Format box, double-click Image Sequence to display a list of image formats and click the image format you want to use.
It is not there.

Need Help.