diff --git a/man/as.challenge.Rd b/man/as.challenge.Rd
index c08e63f..16aee97 100644
--- a/man/as.challenge.Rd
+++ b/man/as.challenge.Rd
@@ -1,88 +1,88 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/challengeR.R
 \name{as.challenge}
 \alias{as.challenge}
 \title{Constructs a challenge object}
 \usage{
 as.challenge(
   object,
   case,
   algorithm,
   value,
   by = NULL,
   taskName = NULL,
   annotator = NULL,
   smallBetter = FALSE,
   na.treat = NULL,
   check = TRUE
 )
 }
 \arguments{
 \item{object}{A data frame containing the assessment data.}
 
 \item{case}{A string specifying the name of the column that contains the case identifiers.}
 
 \item{algorithm}{A string specifying the name of the column that contains the algorithm identifiers.}
 
 \item{value}{A string specifying the name of the column that contains the performance values.}
 
 \item{by}{A string specifying the name of the column that contains the task identifiers. Required for multi-task data set.}
 
 \item{taskName}{A string specifying the task name for single-task data set that does not contain a task column.
 This argument is optional for a single-task data set and is ignored for a multi-task data set.}
 
-\item{annotator}{Not supported}
+\item{annotator}{If multiple annotators annotated the test cases, a string specifying the name of the column that contains the annotator identifiers. Only applies to rang-then-aggregate. Use with caution: Currently not tested.}
 
 \item{smallBetter}{A boolean specifying whether small performance values indicate better algorithm performance.}
 
 \item{na.treat}{Indicates how missing perfomance values are treated if sanity check is enabled. It can be 'na.rm', numeric value or function.
 For a numeric value or function, NAs will be replaced by the specified values. For 'na.rm', rows that contain missing values will be removed.}
 
 \item{check}{A boolean to indicate to perform a sanity check of the specified data set and arguments if set to \code{TRUE}.}
 }
 \value{
 An S3 object to represent the configuration of an assessment data set.
 }
 \description{
 Constructs an S3 object to represent the configuration of an assessment data set originating from a benchmarking competition (so-called "challenge").
 }
 \section{Assessment data set}{
 
 The toolkit provides visualization approaches for both challenges designed around a single task (single-task challenges) and for challenges comprising multiple tasks (multi-task challenges).
 For a single-task challenge, the assessment data set (argument \code{object}) requires the following columns:
 \itemize{
 \item test case identifier (string or numeric)
 \item algorithm identifier (string or numeric)
 \item performance value (numeric)
 }
 
 For a multi-task challenge, the assessment data set (argument \code{object}) requires the following columns:
 \itemize{
 \item task identifier (string or numeric)
 \item test case identifier (string or numeric)
 \item algorithm identifier (string or numeric)
 \item performance value (numeric)
 }
 }
 
 \section{Sanity check}{
 
 It is highly recommended that the sanity check is not disabled when the data set is provided initially.
 It checks that:
 \itemize{
 \item performance values are numeric (if not, raises error)
 \item algorithm performances are observed for all cases (if not, adds them as NA and emits a message)
 \item cases appear only once for the same algorithm (if not, raises error)
 }
 If the argument \code{na.treat} for treatment of NA is specified, NAs will be handled respectively.
 
 It might be reasonable to disable the sanity check for further computations (e.g., for performance reasons
 during bootstrapping (\code{\link{bootstrap.ranked.list}}) where cases are actually allowed to appear more than once for the same algorithm).
 }
 
 \examples{
 # single-task data set
 
 # multi-task data set
 
 }