diff --git a/chrome/content/zotero/itemTree.jsx b/chrome/content/zotero/itemTree.jsx
index 1bf7f8fc81..976c83cb22 100644
--- a/chrome/content/zotero/itemTree.jsx
+++ b/chrome/content/zotero/itemTree.jsx
@@ -2829,6 +2829,14 @@ var ItemTree = class ItemTree extends LibraryTree {
 		else if (column.dataKey === 'hasAttachment') {
 			return this._renderHasAttachmentCell(index, data, column);
 		}
+		else if (column.renderCell) {
+			try {
+				return column.renderCell.apply(this, arguments);
+			}
+			catch (e) {
+				Zotero.logError(e);
+			}
+		}
 		let cell = renderCell.apply(this, arguments);
 		if (column.dataKey === 'numNotes' && data) {
 			cell.setAttribute('aria-label', Zotero.getString('pane.item.notes.count', data, data) + '.');
diff --git a/chrome/content/zotero/itemTreeColumns.jsx b/chrome/content/zotero/itemTreeColumns.jsx
index 08fcd2be55..ba25445d1c 100644
--- a/chrome/content/zotero/itemTreeColumns.jsx
+++ b/chrome/content/zotero/itemTreeColumns.jsx
@@ -49,6 +49,7 @@ const Icons = require('components/icons');
  * @property {boolean} [primary] - Should only be one column at the time. Title is the primary column
  * @property {boolean} [custom] - Set automatically to true when the column is added by the user
  * @property {(item: Zotero.Item, dataKey: string) => string} [dataProvider] - Custom data provider that is called when rendering cells
+ * @property {(index: number, data: string, column: ItemTreeColumnOptions & {className: string}) => HTMLElement} renderCell - The cell renderer function
  * @property {string[]} [zoteroPersist] - Which column properties should be persisted between zotero close
  */
 
diff --git a/chrome/content/zotero/xpcom/itemTreeManager.js b/chrome/content/zotero/xpcom/itemTreeManager.js
index ce38f8c48a..2753af3643 100644
--- a/chrome/content/zotero/xpcom/itemTreeManager.js
+++ b/chrome/content/zotero/xpcom/itemTreeManager.js
@@ -1,7 +1,7 @@
 /*
 	***** BEGIN LICENSE BLOCK *****
 
-	Copyright © 2019 Corporation for Digital Scholarship
+	Copyright © 2023 Corporation for Digital Scholarship
 					 Vienna, Virginia, USA
 					 https://digitalscholar.org
 
@@ -88,6 +88,17 @@ class ItemTreeManager {
 	 *         // return: the data to display in the column
 	 *         return item.getField('title').split('').reverse().join('');
 	 *     },
+	 *     renderCell: (index, data, column) => {
+	 *         // index: the index of the row
+	 *         // data: the data to display in the column, return of `dataProvider`
+	 *         // column: the column options
+	 *         // return: the HTML to display in the cell
+	 *         const cell = document.createElement('span');
+	 *         cell.className = `cell ${column.className}`;
+	 *         cell.textContent = data;
+	 *         cell.style.color = 'red';
+	 *         return cell;
+	 *     },
 	 *     zoteroPersist: ['width', 'hidden', 'sortDirection'], // persist the column properties
 	 * });
 	 * ```
@@ -132,6 +143,7 @@ class ItemTreeManager {
 	 * @param {string | string[]} dataKeys - The dataKey of the column to unregister
 	 * @returns {boolean} true if the column(s) are unregistered
 	 * @example
+	 * The `registeredDataKey` is returned by the `registerColumns` function.
 	 * ```js
 	 * Zotero.ItemTreeManager.unregisterColumns(registeredDataKey);
 	 * ```
@@ -145,8 +157,6 @@ class ItemTreeManager {
 		return true;
 	}
 
-	// TODO: add cell renderer registration
-
 	/**
 	 * Get column(s) that matches the properties of option
 	 * @param {string | string[]} [filterTreeIDs] - The tree IDs to match