You can visualize V4 drawings in V6. The procedure below describes this task.
Import the CATIA V4 Drawing file into CATIA V6 as explained
in V4 Integration User Guide: Importing and using CATIA V4 Models
in CATIA V6. The model file is opened.
Click the sheet tab (by default *DRAFT tab) or the 2D
WSP Detail tab. You can visualize the drawing within the same model
file (if any). You can visualize and select the standard views in this
tab.