diff --git a/DESCRIPTION b/DESCRIPTION
index dd2e61d..9cb55f0 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: tarflow.iquizoo
 Title: Setup "targets" Workflows for "iquizoo" Data Processing
-Version: 3.11.4
+Version: 3.11.5
 Authors@R: c(
     person("Liang", "Zhang", , "psychelzh@outlook.com", role = c("aut", "cre"),
            comment = c(ORCID = "0000-0001-9041-1150")),
@@ -49,4 +49,4 @@ Config/testthat/parallel: true
 Config/testthat/start-first: targets
 Encoding: UTF-8
 Roxygen: list(markdown = TRUE)
-RoxygenNote: 7.3.1
+RoxygenNote: 7.3.2
diff --git a/NEWS.md b/NEWS.md
index d650952..df4d34f 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,10 @@
+# tarflow.iquizoo 3.11.5
+
+## Enhancements
+
+* Enhance documentation of `tar_prep_iquizoo()`.
+* Support new dark theme of pkgdown.
+
 # tarflow.iquizoo 3.11.4
 
 ## Breaking Changes
diff --git a/R/targets.R b/R/targets.R
index 37c9bb3..b9ed49e 100644
--- a/R/targets.R
+++ b/R/targets.R
@@ -16,16 +16,18 @@
 #' @param ... For future usage. Should be empty.
 #' @param what What to fetch. There are basically two types of data, i.e., raw
 #'   data and scores. The former is the logged raw data for each trial of the
-#'   tasks/games, while the latter is the scores calculated by iQuizoo server.
-#'   If set as "all", both raw data and scores will be fetched. Further actions
-#'   on the fetched raw data can be specified by `action_raw_data`.
+#'   tasks/games, and further actions on the fetched raw data can be specified
+#'   by `action_raw_data`. The latter is the scores calculated by iQuizoo
+#'   server.
 #' @param action_raw_data The action to be taken on the fetched raw data. There
-#'   are two consecutive actions, i.e., wrangling and pre-processing. The former
-#'   will parse the raw data into a tidy format, while the latter will calculate
-#'   indices based on the parsed data. If set as "all", both wrangling and
-#'   pre-processing will be done. If set as "parse", only wrangling will be
-#'   done. If set as "none", neither will be done. If `what` is "scores", this
-#'   argument will be ignored.
+#'   are two consecutive actions, i.e., raw data parsing and pre-processing. The
+#'   former will parse the `json` formatted raw data into [data.frame()]s and
+#'   wrap them into one list column, see [parse_data()] for more details. The
+#'   latter will calculate indices based on the parsed data, see
+#'   [preproc.iquizoo::preproc_data()] for more details. If set as `"none"`,
+#'   neither will be done. If set as `"parse"`, only raw data parsing will be
+#'   done. If set as `"all"`, both parsing and pre-processing will be done. If
+#'   `what` is set as `"scores"`, this argument will be ignored.
 #' @param combine Specify which targets to be combined. Note you should only
 #'   specify names from `c("scores", "raw_data", "raw_data_parsed", "indices")`.
 #'   If `NULL`, none will be combined.
diff --git a/_pkgdown.yml b/_pkgdown.yml
index f3e8a52..b2be592 100644
--- a/_pkgdown.yml
+++ b/_pkgdown.yml
@@ -1,6 +1,7 @@
 url: https://psychelzh.github.io/tarflow.iquizoo
 template:
   bootstrap: 5
+  light-switch: true
 reference:
 - title: "Targets Factory Related Functions"
   desc: "A collection of functions to help you build targets."
diff --git a/man/tar_prep_iquizoo.Rd b/man/tar_prep_iquizoo.Rd
index 4d32985..b12c9e0 100644
--- a/man/tar_prep_iquizoo.Rd
+++ b/man/tar_prep_iquizoo.Rd
@@ -29,17 +29,19 @@ fetching. Note \code{contents} should at least contain \code{project_id} and
 
 \item{what}{What to fetch. There are basically two types of data, i.e., raw
 data and scores. The former is the logged raw data for each trial of the
-tasks/games, while the latter is the scores calculated by iQuizoo server.
-If set as "all", both raw data and scores will be fetched. Further actions
-on the fetched raw data can be specified by \code{action_raw_data}.}
+tasks/games, and further actions on the fetched raw data can be specified
+by \code{action_raw_data}. The latter is the scores calculated by iQuizoo
+server.}
 
 \item{action_raw_data}{The action to be taken on the fetched raw data. There
-are two consecutive actions, i.e., wrangling and pre-processing. The former
-will parse the raw data into a tidy format, while the latter will calculate
-indices based on the parsed data. If set as "all", both wrangling and
-pre-processing will be done. If set as "parse", only wrangling will be
-done. If set as "none", neither will be done. If \code{what} is "scores", this
-argument will be ignored.}
+are two consecutive actions, i.e., raw data parsing and pre-processing. The
+former will parse the \code{json} formatted raw data into \code{\link[=data.frame]{data.frame()}}s and
+wrap them into one list column, see \code{\link[=parse_data]{parse_data()}} for more details. The
+latter will calculate indices based on the parsed data, see
+\code{\link[preproc.iquizoo:preproc_data]{preproc.iquizoo::preproc_data()}} for more details. If set as \code{"none"},
+neither will be done. If set as \code{"parse"}, only raw data parsing will be
+done. If set as \code{"all"}, both parsing and pre-processing will be done. If
+\code{what} is set as \code{"scores"}, this argument will be ignored.}
 
 \item{combine}{Specify which targets to be combined. Note you should only
 specify names from \code{c("scores", "raw_data", "raw_data_parsed", "indices")}.