Change-Boom-Buttons-Dynamically.md

@@ -5,9 +5,14 @@ From version 2.0.9, you can change contents in boom-buttons by changing them in
 builder.normalText("Changed!");
 builder.normalTextColor(Color.YELLOW);
 ```
-The text and its color will be changed even when the boom-button is boomed. Check [the demo activity](https://github.com/Nightonke/BoomMenu/blob/master/app/src/main/java/com/nightonke/boommenusample/ChangeBoomButtonActivity.java) for more details.
-**But notice**, not every method can do that magic!
+The text and its color will be changed even when the boom-button is boomed. In this way, the new attributes of the boom-button are stored in builders too, which means the next time when the boom-buttons boom, the contents are the new ones.  Check [the demo activity](https://github.com/Nightonke/BoomMenu/blob/master/app/src/main/java/com/nightonke/boommenusample/ChangeBoomButtonActivity.java) for more details.
+**But notice**, not every method can do that magic! Only the methods of builder whose comment contains a `Synchronicity` tag can meet the demand:
 
+<img src="https://github.com/Nightonke/BoomMenu/blob/master/Pictures/Synchronicity.png" width=500>
+
+The lazy developer will make all methods to support this feature as soon as possible. If you found some methods should support that but not, tell the developer in issues.
+
+### Change Contents from Raw Widget
 You can get the children views of a boom button by the following codes:
 ```
 BoomButton boomButton = bmb.getBoomButton(i);
@@ -19,4 +24,4 @@ if (text != null) text.setText("I'm changed!");
 TextView subText = boomButton.getSubTextView();
 if (subText != null) subText.setText("I'm changed, too!");
 ```
-Notice that the children views and the boom button itself maybe null because boom buttons are cleared in some situation(in list, in fragment, etc.). So you have to check whether they are available. Check the [demo](https://github.com/Nightonke/BoomMenu/blob/master/app/src/main/java/com/nightonke/boommenusample/ChangeBoomButtonActivity.java) for more details.
\ No newline at end of file
+Notice that the children views and the boom button itself **maybe null** because boom buttons are cleared in some situation(in list, in fragment, etc.). So you have to check whether they are available. In this way, the attributes are **NOT** stored in builders. So the next time when booming, the contents may be the old ones, if the attributes-changed-boom-buttons are recovered.
\ No newline at end of file