You can also transition from Sub-State Machines to specific states in any other Sub-State Machine. To do so, make a transition to the state named (Up) Base Layer (the name can vary depending on the Sub-State Machine you are currently in and the names of your layers). If you do this transition, a menu will appear and let you choose the state you want to transition to; see the following screenshot for reference:
Transition to a specific state in another Sub-State Machine