# Row Markers Row markers display the current index of the row as well as provide a means to select and reorder rows when configured. Rows markers are always marked as freeze columns and will always display regardless of horizontal scroll position.

```typescript interface DataEditorProps { // ...other props rowMarkers?: "number" | "none" | "checkbox" | "both" | "checkbox-visible" | "clickable-number"; rowMarkerStartIndex?: number; rowMarkerTheme?: Partial; rowMarkerWidth?: number; // ...other props } ``` *** ### rowMarkers ```ts rowMarkers?: "checkbox" | "number" | "both" | "none"; ``` `rowMarkers` determines whether to display the marker column on the very left. It defaults to `none`. Note that this column doesn't count as a table column, i.e. it has no index, and doesn't change column indexes. *** ### rowMarkerStartIndex ```ts rowMarkerStartIndex?: number; ``` This property is used to set the starting index for row markers in a React component. The `rowMarkerStartIndex` accepts a numerical value that specifies the initial index from which the row markers in the data grid will begin counting. By default, this value is set to `1`. This property is particularly useful when you need the row numbering to start from a specific value other than the default, such as when displaying paginated data or aligning with an external data set's indexing. *** ### rowMarkerTheme ```typescript rowMarkerTheme?: Partial; ``` The `rowMarkerTheme` overrides the theme used for the row marker column. This is commonly used to tint the background of the row marker row and sometimes to fade them out a bit. *** ### rowMarkerWidth ```ts rowMarkerWidth?: number; ``` `rowMarkerWidth` is the width of the marker column on the very left. By default, it adapts based on the number of rows in your data set.