After you run analysis you can either see in output or postprocessing.
As shown in figure below to see output u have to click on icon
You will see concrete design option on left click on that
You can see reinforcement on right side.
or you can see in postprocessing also. Run analysis , go to postprocessing. Than click on beam or column whose reinforcement you want to see. small window will open. Click on concrete design there you can see reinforcement.