Hi kresa33333,
Question 1
Please set property ResizeMode="AutoAdjustHeight", then the editor will auto adjusting the height
<RTE:Editorrunat="server"ID="Editor1"Height="260px" ResizeMode="AutoAdjustHeight"/>
Question 2
The examples below should match your requirement
http://richtexteditor.com/demo/switch_editor.aspx
http://richtexteditor.com/demo/multi_editor.aspx
Regards,
ken