Dimension Problem

I have ask this question before but somehow it disappeared.  With in the Dimension line where the dimension number appears I have a rectangle with a very dim dimension number which cannot be easily read.  I am sure I must have done something that I should not have to cause this.  I have checked to see if I had turned on the "place the dimension in a box option" but it appears I did not.  This really needs to go way!  Also, the drawing is "Read Only" which I did not knowingly setup nor do I want ... What's going on?

Thanks

Leo