Invoice Custom Form

Hi 

I have two questions.

1) I am modifying an existing form which appears to have a text box (I'm not sure it is a text box) which I would like to delete.  For other boxes when I hover over the box the cursor changes to a cross with arrows which allows me to move the box. This box however changes to a cursor which allows me to enter text. I note that if if click select all the box does not highlight like all the other items on the page. How do I select the box? Is there a way to cycle through the contect til I get to the item to be deleted? 

2) When formating the form I can see the page contect and the margin at the bottom of the page. When I go to Print Preview or generate an invoice print job I see/prints a square at the bottom of the page. How do I remove the square from the print?