This template is used on approximately 14,000 pages and changes may be widely noticed. Test changes in the template's /sandbox or /testcases subpages, or in your own user subpage. Consider discussing changes on the talk page before implementing them. |
In Preview only: when a parameter name is unknown or misspelled, this message is shown. It maty appear in a section header.
Example:Populates Category:Pages using Chembox with unknown parameters