How to Modify an EPS Vector File. The Encapsulated PostScript file format stores images and page layouts. EPS files can contain both bitmaps and vectors, but only the vector images can be resized ...

A vector file is an image that can be made infinitely large without losing quality, and usually comes as an .AI, .EPS, .PDF, or .SVG file.

Vector file formats include AI, EPS, SVG and sometimes PDF files, with SVG (Scalable Vector Graphics) being the most common.