to edit branching ratio node go to review and sign off tab, then

click on 'edit' link for the branching ratio you wish to edit

• drag and drop decay mode to equation field to add it to equation
• click on decay mode on equation field to remove it from equation
• click verify and render to verify changes and to proceed to save changes with 'save branching ratio'

to delete branching ratio use 'del' link on review and sign off tab. The link is available only if there is no measurements, associated with thie branching ratio