I don't even have one.  You are referring to Physcial Inventory Enter Tag Counts?
 
On the first screen I enter a Year and Inventory #.
(I have a HELP and LOOKUP button)
On the second screen is where I enter and/or manage the TAGS
(I have ADD, EDIT, DELETE, IMPORT, FIND and CHANGE SEARCH KEY)
 
Where are you seeing this?

Whoops I meant on the Right Hand lower corner

I don't use Warehouse control but I have the button.  
In an already posted PI, if I go to PI-C and select the PI currently displayed (our last one) I get a screen with the list of tag counts and  add,delete,find etc buttons in the lower left, and the exception report and exit button in the lower right.
It appears to be a report for either bins or warehouse locations or both-  It asks whether I want to use items that have WC turned off, and the report is blank if I say NO.  If I say yes, I get this scary screen that  implies I am creating a master bin location but the only field available is DESC/NOTES field.  If I ESC that screen, the report generated has in the exception column "Valid Bin- WC OFF.