diff --git a/onlineGUI/onlineGUI_v1.2.1/online.C b/onlineGUI/onlineGUI_v1.2.1/online.C
index f8f13651f76ada04cc92a73ec7179b0ca95dbf2b..c983c6d5c40f101d90b754a00bd6dbfa799379fa 100755
--- a/onlineGUI/onlineGUI_v1.2.1/online.C
+++ b/onlineGUI/onlineGUI_v1.2.1/online.C
@@ -495,7 +495,10 @@ pair <UInt_t, UInt_t> OnlineConfig::GetPageDim(UInt_t page)
   UInt_t page_index = pageInfo[page].first;
   
   UInt_t size1 = 2;
+
+  if (IsLogx(page)) size1 = 3;  // last word is "logy"
   if (IsLogy(page)) size1 = 3;  // last word is "logy"
+  if (IsLogz(page)) size1 = 3;  // last word is "logy"
   
   // If the dimensions are defined, return them.
   if(sConfFile[page_index].size()>size1-1) {