diff --git a/scribblings/columns-pane.scrbl b/scribblings/columns-pane.scrbl
index 6013364..e08fabe 100644
--- a/scribblings/columns-pane.scrbl
+++ b/scribblings/columns-pane.scrbl
@@ -38,13 +38,13 @@ See also @racket[pane%].
                  [stretchable-height any/c #t])]{
 }
 
-@defmethod*[([(column-min-width (c column-index) [w dimenstion-integer?]) dimension-integer?])]{
+@defmethod*[([(column-min-width (c column-index) [w or/c dimenstion-integer?]) dimension-integer?])]{
  Gets or sets the minimum width (in pixels) of the given column c.
 
  Returns the currently set minimum width for the given column. 
 }
 
-@defmethod*[([(column-align (c column-index) [align <- (or/c 'left 'center 'right)]) (or/c 'left 'center 'right)])]{
+@defmethod*[([(column-align (c column-index) [align (or/c 'left 'center 'right)]) (or/c 'left 'center 'right)])]{
   Gets or sets the horizontal alignment of a given column c.
 
   Returns the currently set alignment.
@@ -52,7 +52,7 @@ See also @racket[pane%].
   Note. Use this right after declaring the columns pane and before adding any children. 
 }
 
-@defmethod*[([(column-keep-min-width (c column-index) [k boolean]) boolean?])]{
+@defmethod*[([(column-keep-min-width (c column-index) [k or/c boolean]) boolean?])]{
   Gets or sets the keep minimal width parameter for a given column c. 
 
   Returns the currently set value.