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At the General Information and Settings, double click the Drop down of Repeater mode power save (marked in screenshot). First click should expand the drop down and second click should collapse.
To turn ON - Press Tab key and then press Up key. Although it is hidden, Talk Permit tone is enabled.
To turn OFF - Press Tab key and then press Down key. Although hidden, Talk Permit tone is enableddisabled.
Write the configurations to the radio as usual.