diff --git a/invesalius/data/viewer_slice.py b/invesalius/data/viewer_slice.py
index b06aa56..c2e3bfb 100755
--- a/invesalius/data/viewer_slice.py
+++ b/invesalius/data/viewer_slice.py
@@ -350,7 +350,7 @@ class CanvasRendererCTX:
 
         Params:
             text: an unicode text.
-            pos: (x, y) position.
+            pos: (x, y) top left position.
             font: if None it'll use the default gui font.
             txt_colour: RGB text colour
         """
@@ -373,7 +373,7 @@ class CanvasRendererCTX:
 
         Params:
             text: an unicode text.
-            pos: (x, y) position.
+            pos: (x, y) top left position.
             font: if None it'll use the default gui font.
             txt_colour: RGB text colour
             bg_colour: RGBA box colour
--
libgit2 0.21.2