If you want your team to skip certain steps and start at a particular step in your Flow, you can use the window provided to select that step. The selected step will turn yellow. Once your team reaches the Boomerang step in your Flow, they will be taken directly to the yellow step you selected. Please note that this feature is optional and your team can still start at the beginning of the Flow by default.
This option is not available in Selected or Dynamic Boomerangs. However, you can combine a Decision steptype before multiple Boomerang: Single steptypes to achieve the same effect.