diff --git a/chrome/content/zotero/xpcom/reader.js b/chrome/content/zotero/xpcom/reader.js
index 2293492a56..5e0117f54b 100644
--- a/chrome/content/zotero/xpcom/reader.js
+++ b/chrome/content/zotero/xpcom/reader.js
@@ -695,9 +695,18 @@ class ReaderInstance {
 			popup.remove();
 		});
 		let menuitem;
-		// Rotate 90
+		// Rotate Left
 		menuitem = this._window.document.createElement('menuitem');
-		menuitem.setAttribute('label', Zotero.getString('pdfReader.rotate90'));
+		menuitem.setAttribute('label', Zotero.getString('pdfReader.rotateLeft'));
+		menuitem.addEventListener('command', async () => {
+			this._postMessage({ action: 'reloading' });
+			await Zotero.PDFWorker.rotatePages(this._itemID, data.pageIndexes, 270, true);
+			await this.reload();
+		});
+		popup.appendChild(menuitem);
+		// Rotate Right
+		menuitem = this._window.document.createElement('menuitem');
+		menuitem.setAttribute('label', Zotero.getString('pdfReader.rotateRight'));
 		menuitem.addEventListener('command', async () => {
 			this._postMessage({ action: 'reloading' });
 			await Zotero.PDFWorker.rotatePages(this._itemID, data.pageIndexes, 90, true);
@@ -713,15 +722,6 @@ class ReaderInstance {
 			await this.reload();
 		});
 		popup.appendChild(menuitem);
-		// Rotate 270
-		menuitem = this._window.document.createElement('menuitem');
-		menuitem.setAttribute('label', Zotero.getString('pdfReader.rotate270'));
-		menuitem.addEventListener('command', async () => {
-			this._postMessage({ action: 'reloading' });
-			await Zotero.PDFWorker.rotatePages(this._itemID, data.pageIndexes, 270, true);
-			await this.reload();
-		});
-		popup.appendChild(menuitem);
 		// Separator
 		popup.appendChild(this._window.document.createElement('menuseparator'));
 		// Delete
diff --git a/chrome/locale/en-US/zotero/zotero.properties b/chrome/locale/en-US/zotero/zotero.properties
index dfb7e704b4..116be676c4 100644
--- a/chrome/locale/en-US/zotero/zotero.properties
+++ b/chrome/locale/en-US/zotero/zotero.properties
@@ -1385,9 +1385,9 @@ pdfReader.promptTransferToPDF.text = Annotations will be transferred to the PDF
 pdfReader.promptPasswordProtected = The operation is not supported for password-protected PDF files.
 pdfReader.promptDeletePages.title = Delete Pages
 pdfReader.promptDeletePages.text = Are you sure you want to delete %1$S page from the PDF file?;Are you sure you want to delete %1$S pages from the PDF file?
-pdfReader.rotate90 = Rotate 90°
+pdfReader.rotateLeft = Rotate Left
+pdfReader.rotateRight = Rotate Right
 pdfReader.rotate180 = Rotate 180°
-pdfReader.rotate270 = Rotate 270°
 pdfReader.editPageNumber = Edit Page Number…
 pdfReader.editHighlightedText = Edit Highlighted Text
 pdfReader.pageNumberPopupHeader = Change page number for: