The Formula Cell Editor is the default editor for columns with allowFormula: true. It tokenises cell references, highlights ranges, and provides function autocomplete while you type.
Default Formula Editor Copy Link
If a column enables formulas and does not specify a cellEditor, the grid automatically uses the Formula Cell Editor.
Range highlights and range handle editing require cellSelection to be enabled. Without it, the editor still works but range highlights and handles are not shown.
Disabling Formulas Cell Editor Copy Link
Providing a cellEditor opts the column out of the Formula Cell Editor. Formulas still evaluate, but range highlighting, handles, and function autocomplete are disabled because a different editor is in use.