When you open the procedure, the Create tab first appears. This is where you classify and select the list using different selection alternatives.
Further down in the window under the heading Generate manufacturing order rows, you can determine whether or not the loaded manufacturing order suggestion should be selected to be included when generating manufacturing order rows. The suggestions that should be generated into orders must then be selected manually.
Under Show... you can choose to load an extended list with information about the quantity that there is enough material in the physical stock balance to cover. You can select which part types you want to include, manufactured and stocked parts are selected by default.