short key for Zebra OSC tune to ( +12/+24 ) or ( -12/-24 ) ?

[Payam Tavakoli]

Hello friends

Is there a short key for Zebra Oscillators tune to hold that and tune

jump to ( +12/+24 ) or ( -12/-24 ) ?!! ( Like NI Massive )
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If any body have Short key list ,

Or Know any Secret short Key in Zebra

I am very grateful if you tell me

Payam