diff --git a/README.md b/README.md
index 8c2f02799e8ebff2c57eaffa78371bd9dc26d8aa..db746f988865dc96d1fb50a3657da9e14ab1bb71 100644
--- a/README.md
+++ b/README.md
@@ -15,16 +15,16 @@ This is a tool to convert ridffile to rootfile using ANAROOT decoder. (https://r
 ANAROOT is automatically installed by "cmake" in the project directory in order to make it easier to edit decoder file. The part of install of ANAROOT is written in ./CMakeLists.txt.
 
 ## Note
-* Multihit TDC records all hit in one trigger, but this tool include only one hit event.
-  * Now, this stores the data of the last hit, but do we need to stores all hit or first hit?
-  * -> if first hit is more important, simply we can change in "main.cpp", but if all hits are needed, source files are needed to edit. (in preparation (okawa) )
+* Multihit TDC records all hit in one trigger, but map tree include only one hit event. (last hit)
+  * raw data tree store all hit and calibration tree also contain all hit
+  * the format of timing branch of calibration tree are array (like branch[12]) in order to match the format of mhtdc
 
-* The structure of the branches of rootfile depends on the map file, so now a single branch contains both ADC and TDC data and it is distinguished by channel.
+* The structure of map tree branches depends on the map file, so now a single branch contains both ADC and TDC data and it is distinguished by channel.
   * ex. "name[0]": ADC, "name[1]": TDC
 
 * When the name contains "-", "/" or " " in mapfile and we use it as branch name, sometimes it is recognized as an operator, so this tool change them to "\_".
 
-* The format of 
+* Calibration tree depends on the map tree. And the name of parameter file is important (cannot name arbitrary)
 
 * Assume that calibration parameters of two energy output are the same