diff --git a/app/pdf-viewer/buffer.py b/app/pdf-viewer/buffer.py
index 37716a7..3a8bb42 100755
--- a/app/pdf-viewer/buffer.py
+++ b/app/pdf-viewer/buffer.py
@@ -204,7 +204,8 @@ class PdfViewerWidget(QWidget):
         # Init scale and scale mode.
         self.scale = 1.0
         self.read_mode = "fit_to_width"
-        if (self.emacs_var_dict["eaf-pdf-read-mode"] == "fit_to_customize"):
+        # Simple string comparation. 
+        if (self.emacs_var_dict["eaf-pdf-default-zoom"] != "1.0"):
             self.read_mode = "fit_to_customize"
             self.scale = float(self.emacs_var_dict["eaf-pdf-default-zoom"])
         self.horizontal_offset = 0
diff --git a/eaf.el b/eaf.el
index b228beb..bfdec7c 100644
--- a/eaf.el
+++ b/eaf.el
@@ -269,8 +269,7 @@ It must defined at `eaf-browser-search-engines'."
     (eaf-browser-aria2-proxy-port . "")
     (eaf-browser-dark-mode . "follow")
     (eaf-pdf-dark-mode . "follow")
-    (eaf-pdf-read-mode . "fit_to_customize")
-    (eaf-pdf-default-zoom . "1.5")
+    (eaf-pdf-default-zoom . "1.0")
     (eaf-terminal-dark-mode . "follow")
     (eaf-terminal-font-size . "13")
     (eaf-mindmap-dark-mode . "follow")