I am attempting to update a drawing using the commands form the Annotation toolbar. The commands will not show on the drawing. For example when choosing the note command I am unable to enter text. Usually a box appears with a white background where we enter text. All I see are the red square nodes at the periphery of the box but it has the same color as the drawing background. I tap letters on keyboard and no letters appear but the "invisble" box stretches as if the letters are being entered. The other commands will not show on drawing either. There was no problem when I initially created this drawing. I tried the commands from the Annotation toolbar on another drawing and they worked. Something is wrong withe this particular drawing file that is causing grief? Any ideas? Thank you.