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Introduction

Current version

screen   0a - 0b - 1 - 2 - 3 - 4a - 4b - 5 - 6 - 7a - 7b - GOMS - heuristics

Improvement 1

screen   1a - 1b - 2a - 2b - 2c - 3a - GOMS - heuristics

Improvement 2

screen   1a - 1b - 2a - 2b - 2c - GOMS - heuristics

Conclusion