The "Edit Points" editor option is useful but it used to be possible to add points to a Copper Area or a Solid Region boundary simply by clicking on part of the boundary between existing points.
In V5.6.10 it now apears the only option is to used the "Edit Points" X, Y co-ordinate and Arc dialogue box.
This is very tedious and time consuming because it is not always clear where in XY space a new point may need to be added whereas on the PCB it is quite clear. That means that ponts have to be added in the dialogue box and then moved in the Editor to put them exactly where the user wants.
This may be OK for simple shapes but for fitting around complex shapes ad board outlines it can take a long time to do this.
- It is still possible to delete points by double-clicking on them so why not keep the option of adding them by double-clicking on an empty section of boundary?
I can't remember if Copper Area and Solid Region used to have draggable blue circles like in just PCB Tracks but I think that introducing that (or adding it back in again) would be an ideal and very fast solution!
Thanks.
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
Got it！we miss this feature not remove it on purpose when we finish this function.....
we will fix this.
Thanks