This is found in the discussion regarding the Shiur of Kezayis, whether the food must be compressed or not. In Siman 486 the Rema speaks about compressing the lettuce. <div><br><div>The Acharonim say that Matza which is bendy and soft like a sponge - Racha VeAsuYa KeSeFog, need not be compressed.</div>
<div><br></div><div>BTW, the contents of that Simanim in the Tur do not correspond to the ShA</div><div><div><br></div><div>meir</div></div></div>