"This modification is not allowed, because selection is blocked"

[Raul20]

Hello, I recently downloaded a scholarship application form and I can write
on the file but when I try to modify the size of the position of the tables
that appear on it, I keep getting the message:

"This modification is not allowed, because selection is blocked"

I have installed and activated my word 2007. Can anyone tell me how to
correct this?

 

[Terry Farrell]

If it is a form, it is almost certainly protected to stop users from
resizing cells or changing anything other than writing answers in the
allotted spaces.