adjusting field

I'm sure that this is a simple solution but I can't get figure out how to resize the blue field to match the black field. The dots surrounding the blue field do not allow me to resize it horizontally or vertically, any suggestions? When I click on the blue field, the program is identifying it as an image but I don't want to insert a picture. Do I need both fields? I just want people to be able to enter numbers.   Thanks so much!