diff --git a/DESCRIPTION b/DESCRIPTION
index 95a097c5..2bb30c59 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -54,10 +54,10 @@ biocViews: ImmunoOncology, MassSpectrometry, Proteomics, Software, Normalization
 LazyData: true
 URL: http://msstats.org
 BugReports: https://groups.google.com/forum/#!forum/msstats
-RoxygenNote: 7.3.3
 Encoding: UTF-8
 NeedsCompilation: no
 Packaged: 2017-10-20 02:13:12 UTC; meenachoi
 LinkingTo: 
     Rcpp,
     RcppArmadillo
+Config/roxygen2/version: 8.0.0
diff --git a/R/plot_quality_metrics.R b/R/plot_quality_metrics.R
index f64368f6..c98e953f 100644
--- a/R/plot_quality_metrics.R
+++ b/R/plot_quality_metrics.R
@@ -24,10 +24,12 @@
 #'   when \code{isPlotly = TRUE}.
 #'
 #' @details
-#' The x-axis order is determined by the factor levels of the \code{Run}
-#' column. When \code{runOrder} is passed to the converter the \code{Run}
-#' column is automatically set to an ordered factor; otherwise the runs appear
-#' in alphabetical order.
+#' The x-axis shows the integer order position of each run (1, 2, 3, ...)
+#' rather than the run name, to avoid clutter when run names are long.
+#' Positions are determined by the factor levels of the \code{Run} column.
+#' When \code{runOrder} is passed to the converter the \code{Run} column is
+#' automatically set to an ordered factor; otherwise the runs appear in
+#' alphabetical order.
 #'
 #' Metric values are averaged across fragment ions within each
 #' PeptideSequence + PrecursorCharge + Run combination before plotting, so
@@ -95,22 +97,25 @@ MSstatsQualityMetricsPlot <- function(input, metric = "AnomalyScores",
     )
     colnames(plot_df)[colnames(plot_df) == "x"] <- metric
 
-    # Preserve run factor ordering from the original data
-    plot_df$Run <- factor(plot_df$Run, levels = levels(input_df$Run))
+    # Preserve run factor ordering from the original data and map each
+    # Run to its integer position so the x-axis shows order numbers
+    # instead of run names (which can be long and clutter the axis).
+    run_levels <- levels(input_df$Run)
+    plot_df$RunOrder <- match(as.character(plot_df$Run), run_levels)
 
     p <- ggplot(plot_df,
-                aes(x     = .data[["Run"]],
+                aes(x     = .data[["RunOrder"]],
                     y     = .data[[metric]],
                     color = .data[["Precursor"]],
                     group = .data[["Precursor"]])) +
         geom_line(linewidth = 0.6) +
         geom_point(size = 1.5) +
-        scale_x_discrete(guide = guide_axis(angle = 45)) +
+        scale_x_continuous(breaks = seq(5, length(run_levels), by = 5)) +
         theme_bw() +
         theme(axis.text.x  = element_text(size = 8),
               legend.title = element_text(size = 9),
               legend.text  = element_text(size = 7)) +
-        labs(x        = "Run (temporal order)",
+        labs(x        = "Run order",
              y        = metric,
              title    = paste("Quality Metric:", metric),
              subtitle = which.Protein,
diff --git a/R/utils_documentation.R b/R/utils_documentation.R
index 2cc03d61..699789e7 100644
--- a/R/utils_documentation.R
+++ b/R/utils_documentation.R
@@ -1,8 +1,7 @@
 #' A dummy function to store shared documentation items.
 #' 
 #' @import data.table
-#' @importFrom MSstatsConvert MSstatsImport MSstatsClean MSstatsPreprocess 
-#' MSstatsBalancedDesign MSstatsMakeAnnotation MSstatsLogsSettings
+#' @importFrom MSstatsConvert MSstatsImport MSstatsClean MSstatsPreprocess MSstatsBalancedDesign MSstatsMakeAnnotation MSstatsLogsSettings
 #' 
 #' @param removeFewMeasurements TRUE (default) will remove the features that have 1 or 2 measurements across runs.
 #' @param useUniquePeptide TRUE (default) removes peptides that are assigned for more than one proteins. 
diff --git a/man/MSstatsQualityMetricsPlot.Rd b/man/MSstatsQualityMetricsPlot.Rd
index 6ef07a56..959e55d1 100644
--- a/man/MSstatsQualityMetricsPlot.Rd
+++ b/man/MSstatsQualityMetricsPlot.Rd
@@ -43,10 +43,12 @@ coloured line, mirroring the feature-level view in
 \code{\link[MSstats]{dataProcessPlots}}.
 }
 \details{
-The x-axis order is determined by the factor levels of the \code{Run}
-column. When \code{runOrder} is passed to the converter the \code{Run}
-column is automatically set to an ordered factor; otherwise the runs appear
-in alphabetical order.
+The x-axis shows the integer order position of each run (1, 2, 3, ...)
+rather than the run name, to avoid clutter when run names are long.
+Positions are determined by the factor levels of the \code{Run} column.
+When \code{runOrder} is passed to the converter the \code{Run} column is
+automatically set to an ordered factor; otherwise the runs appear in
+alphabetical order.
 
 Metric values are averaged across fragment ions within each
 PeptideSequence + PrecursorCharge + Run combination before plotting, so
diff --git a/man/reexports.Rd b/man/reexports.Rd
index 22f4362c..968ebc67 100644
--- a/man/reexports.Rd
+++ b/man/reexports.Rd
@@ -20,6 +20,6 @@ These objects are imported from other packages. Follow the links
 below to see their documentation.
 
 \describe{
-  \item{MSstatsConvert}{\code{\link[MSstatsConvert]{DIANNtoMSstatsFormat}}, \code{\link[MSstatsConvert]{DIAUmpiretoMSstatsFormat}}, \code{\link[MSstatsConvert]{FragPipetoMSstatsFormat}}, \code{\link[MSstatsConvert]{MaxQtoMSstatsFormat}}, \code{\link[MSstatsConvert]{OpenMStoMSstatsFormat}}, \code{\link[MSstatsConvert]{OpenSWATHtoMSstatsFormat}}, \code{\link[MSstatsConvert]{PDtoMSstatsFormat}}, \code{\link[MSstatsConvert]{ProgenesistoMSstatsFormat}}, \code{\link[MSstatsConvert]{SkylinetoMSstatsFormat}}, \code{\link[MSstatsConvert]{SpectronauttoMSstatsFormat}}}
+  \item{MSstatsConvert}{\code{\link[MSstatsConvert:DIANNtoMSstatsFormat]{DIANNtoMSstatsFormat()}}, \code{\link[MSstatsConvert:DIAUmpiretoMSstatsFormat]{DIAUmpiretoMSstatsFormat()}}, \code{\link[MSstatsConvert:FragPipetoMSstatsFormat]{FragPipetoMSstatsFormat()}}, \code{\link[MSstatsConvert:MaxQtoMSstatsFormat]{MaxQtoMSstatsFormat()}}, \code{\link[MSstatsConvert:OpenMStoMSstatsFormat]{OpenMStoMSstatsFormat()}}, \code{\link[MSstatsConvert:OpenSWATHtoMSstatsFormat]{OpenSWATHtoMSstatsFormat()}}, \code{\link[MSstatsConvert:PDtoMSstatsFormat]{PDtoMSstatsFormat()}}, \code{\link[MSstatsConvert:ProgenesistoMSstatsFormat]{ProgenesistoMSstatsFormat()}}, \code{\link[MSstatsConvert:SkylinetoMSstatsFormat]{SkylinetoMSstatsFormat()}}, \code{\link[MSstatsConvert:SpectronauttoMSstatsFormat]{SpectronauttoMSstatsFormat()}}}
 }}