When you're fine-tuning a texture using the PEP Texture Applicator, you select the polygons to manipulate in the right side of the editor's window. Adjust your view here the same way you would in the Examiner Viewer. See Viewer Controls and Menus for details.
To select polygons:
Notice the left window of the PEP Texture Applicator. This is a flat mapping of the texture and the polygons it covers. Switch to this window to choose a part of your selected polygons and move, resize, or rotate the texture. See Remapping a Texture in the PEP Texture Applicator for detailed steps.
Jump to: Fine-tuning a Texture