I added a Textbox to a Word 2007 document by going
to the Developer option(in the File menu), then chose Design Mode,
then Legacy Tools->Text box Field. The MultiLine
and Enterkey properties are set to True and the rest
are default. The textbox is of size so that it can take some
10 rows of lines. Is there a feature I can choose/set so that
when more than 10 rows of lines are entered the text box
will automatically expand? The rows need to increase so the
textbox needs to expand downwards to accommodate the
text more than 10 lines.
Can someone please advise if there is a way to do it?

I set the AutoSize to true, but
when I go out of the Design mode and try entering text, the
Textbox shrinks to a size which can hold only one character
per line.