diff --git a/viewer/charts/JFJochDatasetInfoChartView.cpp b/viewer/charts/JFJochDatasetInfoChartView.cpp
index 9dc5e79a..c2f7cda0 100644
--- a/viewer/charts/JFJochDatasetInfoChartView.cpp
+++ b/viewer/charts/JFJochDatasetInfoChartView.cpp
@@ -228,6 +228,8 @@ void JFJochDatasetInfoChartView::buildTimeDomainChart() {
         if (primary_color_.isValid())
             series->setColor(primary_color_);
         currentSeries = new QScatterSeries(this);
+        currentSeries->setColor(Qt::black);     // "current image" marker: fixed, not a run colour
+        currentSeries->setMarkerSize(9.0);
 
         double dispMin = std::numeric_limits<double>::infinity();
         double dispMax = -std::numeric_limits<double>::infinity();