This command creates a fleet using your most recent designs that uses <span class="parameter parameter-primary">Amount</span> Naval Capacity. The amount should be a number between 0 and 1. 1 means 100% and 0 means 0%.
Press the ~ / ` key to open the command console. This key is located at the top left of the keyboard, usually under the F1 or ESC key. Type the command and press the Enter key.