STEP 1: Go to 'Functions' > click 'Vendors' under the 'Options' header:
STEP 2: Use the search options to find the Vendor you want to edit and click 'Search':
NOTE: click 'Search' without entering any search options to search for ALL Vendors
STEP 3: Click on the name of the Vendor you want to edit:
STEP 4: Update the appropriate information and click 'Save':
