The diode is flipped in each image. If the ohmmeter reads a finite resistance, that means the diode is conducting a small current in the forward direction, and the red +++ lead from the meter is touching the anode. If the resistance reads O.L (for overload), the diode is not conducting current. That means the red +++ test lead is touching the cathode.
Once the voltage applied to the anode is made more positive than the cathode by an amount greater than the depletion layer potential, forward conduction from anode to cathode conventional current commences.
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