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3- Define Reinforcement Options for Cracking Analysis via Analyze > Cracking Analysis Options...
4- Define Modulus of Rupture for Cracked Deflections via Define > Material Properties...
5- First run analysis for the linear load cases that are part of the design load combinations and perform concrete slab design and concrete frame design. Then set the nonlinear cracked analysis load cases to run via Analyze > Set Load Cases To Run... Design must be run at least once before running the nonlinear cracked analysis load cases otherwise minimum rebars will be used.
6- After design is completed and deemed acceptable, go Analyze > Set Load Cases To Run... highlight and run the nonlinear cracked analysis load cases