why does Plus sign appear in form fields

[Dasman@adobeforums.com]

I have a simple form setup in Acrobat 7 on Mac that has 4 columns of
data collected in rows across the form. One of the columns records time
and tracks the total into a separate field at bottom of document. I
have noticed that once I start placing data into the fields in the 4th
row, an inverted plus sign shows after I tab out of the field. The data
in the field shows OK, but is followed by a black box with a white
plus sign in it. This continues across the rows, each field now has the
inverted plus after I leave the field. The form appears to be working
OK but the little inverted plus signs make us all think something is
wrong. I searched this site and found nothing re: the plus signs, which
I believe are trying to tell me something. Does anyone know why these
plus signs started showing up? Are they marking something? Thanks in
advance, Dana

[AnneJohnson@adobeforums.com]

Correct Jon. The text box needs to be increased. The plus indicates there is more information then will fit within the box as drawn.