Yes, you can and must set the trim in the A320 on the ground for the takeoff as you would in any other aircraft. Based on your TOCG (Takeoff CG) value in the MCDU, you would look at that scale right next to the thrust levers and find what the corresponding trim setting would be. For example if your CG is around 30 you would have about 0.3 nose down trim.
You physically set that with the actual trim wheel which is the wheel right next to that with the white and black banding. Where do you see the set trim value? You can bring it up using the ECAM FCTL page or, as you are doing your after start flight control check, the FCTL page is automatically brought up and you will be able to set and see your value there.
You can also enter this value on the PERF page of the MCDU where it asks for “THS” which is AirbusSpeak for Trimmable Horizontal Stabilizer. It is a reference for the pilot only and the MCDU doesn’t actually use it.
There is a chart for this. as shown below. So, yes the A320 has “auto trim” but that has nothing to do with setting the takeoff trim which must be manually set.
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