When the record is in full edit mode
de-select the sector that you want to remove from the record
and click save
when all changes have been applied to the record
If you just want to edit the sector:
Hover over the sector box, the edit icon (pencil)
should appear in the top right hand corner
Click the edit icon
Un-tick the sector(s) you want to remove
Click the Save icon at the bottom of the box
