diff --git a/example/album.py b/example/album.py
index 4047007..803f273 100644
--- a/example/album.py
+++ b/example/album.py
@@ -15,7 +15,8 @@ photobook.set_auto_page_break(False)
 
 photobook.set_fig_folder("textures")
 photobook.one_centered("eugene.jpg", "one_centered default")
-photobook.one_centered("eugene.jpg", "one_centered part_of_text=2", part_of_text=2)
+photobook.one_centered("eugene.jpg", "")
+photobook.one_centered("eugene.jpg", "one_centered text_ratio=1, img_ratio=1", text_ratio=1, img_ratio=1)
 
 
 photobook.output(dest)
diff --git a/photobook/photobook.py b/photobook/photobook.py
index 32d9895..ebdd7ba 100644
--- a/photobook/photobook.py
+++ b/photobook/photobook.py
@@ -109,15 +109,14 @@ class Photobook(FPDF):
         self,
         img,
         text="",
-        part_of_text=6,
+        img_ratio=5,
+        text_ratio=1,
     ):
         """Display the picture centered with text below"""
         self.add_page()
 
-        if text == "":
-            text_size = (0, 0)
-        else:
-            text_size = (self.epw, (self.eph - self.sep) / part_of_text - self.sep)
+        total_ratio = img_ratio + text_ratio
+        text_size = (self.epw, (self.eph - self.sep) * text_ratio / total_ratio - self.sep)
 
         img_size = (self.epw, self.eph - text_size[1])
         img_dest = self.img_process(img, img_size)