[Qgis-user] Editing attributes

[Kurt Springs]

I am trying to label certain sites.  I originally used ascii files to  
put the sites into GRASS.  However, this leaves some ascii codes in  
the labels in Qgis.

For example, the label comes out:  #1 %51 @"Cat. 51".  All I need is  
Cat. 51 to appear on the map.  This is in column str_1.  The "toggle  
editing mode" button is grayed out.  How can I edit this column?

Thanks for any help.

Kurt