The turrets tab is displayed in the Manufacturing Results Window on the right-hand pane of FeatureCAM. It is only visible is you are doing synchronized turning.
To display this tab:
Click on the Results tab in the upper right corner of the FeatureCAM screen.
Click on the Turrets tab in the lower left corner of the window.
The Turrets tab list each spindle on the left-hand side of the window. Each turret that can operate on the spindle is listed below each spindle. Along the top of the window is a time scale in minutes. The time scale can be shortened or lengthened by rolling the wheel on the mouse. The operations performed on each turret are listed in boxes under the time scale. In the example shown below, the machine has two spindles and two turrets that can cut parts loaded into either spindle. The main spindle has a roughing operation that is performed simultaneously on both turrets. The identical length of the boxes surrounding the roughing operations shows that they will take the same time to cut.

Assign an operation to a turret
Synchronization for a single operation