Yes. Debut provides high-fidelity renditions of Photoshop (PSD), Illustrator (AI) or InDesign (INDD) files. You can also open PDF, JPEG, PNG and GIF files directly in Debut. Additionally, you can get the highest fidelity view of your work by opting to view it at original size.
Pinch to zoom in on images; Drag to pan; Double-tap to view at 100%: