This poster describes a visualization tool that uses polar coordinates to create a circular shaped layout of large
call trees of Strand programs. Due to the enormous amount of processes which are generated during
execution of parallel Strand programs, conventional techniques to display call trees are overcharged. Out of
this motives the tool "Polaranimation" was developed and implemented. One of its prominent features is the
ability to display the complete call tree without loosing any vital information. Additionally, it provides
debugging facilities and supports the performance tuning of parallel programs. A number of Strand programs
have been written and a performance evaluation and comparison guided by "Polaranimation" was conducted.