diff --git a/DESCRIPTION b/DESCRIPTION
index 723360cb..76bf63c1 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: threeBrain
 Type: Package
 Title: 3D Brain Visualization
-Version: 1.0.1.9021
+Version: 1.0.1.9022
 Authors@R: c(
     person("Zhengjia", "Wang", email = "dipterix.wang@gmail.com", role = c("aut", "cre", "cph")),
     person("John", "Magnotti", email = "John.Magnotti@Pennmedicine.upenn.edu", role = c("aut", "res")),
diff --git a/R/class_brain.R b/R/class_brain.R
index 25483e1f..c1f732fc 100644
--- a/R/class_brain.R
+++ b/R/class_brain.R
@@ -892,7 +892,8 @@ Brain2 <- R6::R6Class(
 
     plot_electrodes_on_slices = function(
       electrodes_to_plot = "all", volume = NULL, elec_table = NULL,
-      zoom = 1, electrode_color = "green", electrode_size = 2, ...,
+      zoom = 1, adjust_brightness = NA,
+      electrode_color = "green", electrode_size = 2, ...,
       decoration = function(i, j) {
         graphics::points(0, 0, pch = 20, col = electrode_color,
                          cex = electrode_size)
@@ -936,14 +937,19 @@ Brain2 <- R6::R6Class(
 
 
       # load up volume and adjust brightness
-      adjust_brightness <- TRUE
+
       if(is.null(volume)) {
         volume <- self$volumes$T1$object$group$group_data$volume_data$absolute_path
-        adjust_brightness <- FALSE
+        if(is.na(adjust_brightness)) {
+          adjust_brightness <- FALSE
+        }
       }
       if(!inherits(volume, "threeBrain.volume")) {
         volume <- read_volume(volume)
       }
+      if(is.na(adjust_brightness)) {
+        adjust_brightness <- TRUE
+      }
       if( adjust_brightness ) {
         qt <- quantile(volume$data, c(0, 0.95), na.rm = TRUE)
         volume$data[] <- (volume$data - qt[[1]]) / (qt[[2]] - qt[[1]]) * 255