The Tell-Tale Sign Your Pizza Dough Is Ready To Stretch - Tasting Table
Briefly

Kneading your dough appropriately is essential to develop the gluten needed... The gluten in the dough needs to relax before it gets stretched, as this helps it not to break.
Using the poke test to determine when your dough is done proofing... If the indent holds and only springs back up slowly and halfway, that means the dough is ready to be stretched and baked.
Read at Tasting Table
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