After selecting the menu item "Reinforcement" the following window appears:
This displays the relative gain for the left and right sole. Pressing the button again start/centre a cursor in the form of a small line appears under the left-hand number, which can now be changed using the ← or → keys. Pressing the button again start/centre places the cursor under the right-hand number, then under the left-hand number again and so on. The possibility of changing the gain is limited to the range 50%..150%. This menu can be selected during a measurement with the "Monitor" operating mode, e.g. to change the level of the device. Press the button save saves the set values for the relative gain.