Select the Selection icon on the toolbar:
Using this icon gives you maximum control over selection in the PDF format. Using this selection feature, you are allowed to select row-by-row and column-by-column. This works best when you only want to select certain columns on the page, instead of selecting all of them.
Holding the left mouse button down, drag the mouse over the columns or portions of the document you wish to be selected.
With "Select Area" Selection, we can eliminate the irrelevant parts of the page and get a perfect conversion of the data we want converted.
This article refers to Able2Doc, Able2Doc Professional, Able2Extract and Able2Extract Professional.