Multiple selection of text or objects at runtime

[amanind]

see i am making a clone of http://businesscards.com/account/edi...1;category]=10 , now in my editor all the tools were working perfectly .

My problem is i dont know how to make undo/redo and multiple selection of text or objects in editor at runtime like as you see in http://businesscards.com/account/edi...1;category]=10, you can select mutiple text and objects at one time

Please see this site http://businesscards.com/account/edi...1;category]=10, you can understand what i want
I will really appricate if u help me

Thanks