Проблема решена путем создания таких фреймов:
# -------------------------------------------------------------------------FRAME 1
def vl_1():
mine_frame_1 = Frame(app, relief=GROOVE, borderwidth=1)
mine_frame_1.pack(fill=BOTH, expand=True, padx=1, pady=1)
def fwd_1():
value_1 = slt_value_1.get()
if value_1 == '3':
mine_frame_1.forget()
vl_3()
if value_1 == '4':
mine_frame_1.forget()
vl_4()
btn_fwd_1 = ttk.Button(mine_frame_1, text='>', command=fwd_1)
btn_fwd_1.pack(fill='y', side='right')
def bwd_1():
mine_frame_1.forget()
vl_0()
btn_bwd_1 = ttk.Button(mine_frame_1, text='<', command=bwd_1)
btn_bwd_1.pack(fill='y', side='left')
value_1_frame = Frame(mine_frame_1, relief=FLAT, borderwidth=1)
value_1_frame.pack(fill=BOTH, expand=True, padx=1, pady=60)
lbl_value_1 = tk.Label(value_1_frame, text='Value 1:')
lbl_value_1.pack(padx=1, pady=1)
slt_value_1 = ttk.Combobox(value_1_frame, values=['3', '4'])
slt_value_1.pack(padx=1, pady=1)