Help: How to move C and E to A

How may I move point C and E to A without loosing the current restrictions (E is limited to the line CD, and C is limited to AB). I want to do this by commands (button) .
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Rodland —

 
Resource Type
Activity
Tags
button  commands  help 
Target Group (Age)
19+
Language
English (United Kingdom)
 
 
GeoGebra version
4.2
Views
1100
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License
CC-BY-SA, GeoGebra Terms of Use
 
 
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