The visualization of monolayers at the air/water interface by Brewster Angle Microscope (BAM) was used to watch the movement of the domains of surfactant or surface-active complexes without any adscititious probe materials, and to examine the changes in surface rheology of partially hydrolyzed polyacrylamide (WFAM)/surfactant systems. Clear indications of rheological properties at the air/water interface are obtained over substantial concentration regions of the HPAM/Sodium Dodecyl Benzene Sulfonate (SDBS) and HPAM/Tritan X-100/SDBS systems, respectively.