R 如何使用plotly在Sankey图表中永久显示节点上的值？

我在SAP Analytics Cloud的R可视化中使用了该代码。此时，值仅在将鼠标悬停在节点上时显示。但是控制者希望在节点上永久地看到值。 这是我目前的代码：

#input data

Sys.setlocale("LC_ALL", "de_DE.UTF-8")

library('plotly')

plot_ly(
  type = 'sankey',
  orientation = 'v',
  textfont = list(size=15),
  node = list(
  label = c("Net Sales III",   "Gross Margin",     "Costs of Material",
              "Base Contribution",     "Bonus/Malus(incl. Leftover)",      "Service Charge Division Costs",    "Logistic Costs",
              "EBIT",       "Fixed Costs Sales",    "Marketing Costs"),
    x = c(0,0.3, 0.3, 0.6, 0.6, 0.6, 0.6, 0.9, 0.9, 0.9),
    y = c(0.1,0.25, 0.8, 0.13, 0.3, 0.4, 0.6, 0.055, 0.2, 0.3),
    color = c("C0A468", "C0A468", "EDD38E","C0A468", "EDD38E","EDD38E", "EDD38E","C0A468", "EDD38E", "EDD38E") ,
   pad = 30,   # Zwischenraum
   thickness = 30,  #Dicke der Nodes
   line = list(
      color = "black",
      width = 1
    )
 ),
  link = list(
    source = c(0,0,1,1,1,1,3,3,3),   
    target = c(1,2,3,4,5,6,7,8,9),
    value = c(R_BHP_L_GCO_001_PCA_G002_Sankey$'Gross Margin',
              -R_BHP_L_GCO_001_PCA_G002_Sankey$'Costs of Material',
              R_BHP_L_GCO_001_PCA_G002_Sankey$'Base Contribution',
              R_BHP_L_GCO_001_PCA_G002_Sankey$'Bonus/Malus (incl. Leftover)',
              -R_BHP_L_GCO_001_PCA_G002_Sankey$'Service Charge Division Costs',
              -R_BHP_L_GCO_001_PCA_G002_Sankey$'Logistic Costs',
               R_BHP_L_GCO_001_PCA_G002_Sankey$'EBIT',
                                                -R_BHP_L_GCO_001_PCA_G002_Sankey$'Fixed Costs Sales - POS'-R_BHP_L_GCO_001_PCA_G002_Sankey$'Fixed Costs Sales without POS',
                                               -R_BHP_L_GCO_001_PCA_G002_Sankey$'Marketing Costs - POS'-R_BHP_L_GCO_001_PCA_G002_Sankey$'Marketing Costs without POS'),
      color = c("rgba(200,200,200,1)",
                "rgba(200,200,200,0.2)",
                "rgba(200,200,200,1)",
                "rgba(200,200,200,0.2)",
                "rgba(200,200,200,0.2)",
                "rgba(200,200,200,0.2)",
                "rgba(200,200,200,1)",
                "rgba(200,200,200,0.2)",
                "rgba(200,200,200,0.2)",
                "rgba(200,200,200,0.2)")
  )
)