Copy all text from multiple text boxes at once

I am trying to have a way to select and copy all text at once from a scanned pdf file. I downloaded the Acrobat Pro DC to get the OCR text recognition ability. After I click on "Edit PDF", the text gets recognized, but is separated into many individual text boxes, which prevents me from selecting and copying all text at once. Is there any way to "turn off" or merge all text boxes? In Adobe Acrobat X Standard or previous version of Acrobat Pro, I was able to select all text simultaneously, but not on this current version.