How to open attributes ?

[goga63]

Good day !
On this great forum I found the code which creates a simple cube

new_comp_def = Sketchup.active_model.definitions.add("MyCube") ;  
points = Array.new ; 
points[0] = ORIGIN ;
points[1] = [100, 0 , 0] ; 
points[2] = [100, 100, 0] ; 
points[3] = [0 , 100, 0] ; 
newface = new_comp_def.entities.add_face(points) ;
newface.reverse! if newface.normal.z < 0 ; 
newface.pushpull(100) ;
trans = Geom;;Transformation.new ; 
Sketchup.active_model.active_entities.add_instance(new_comp_def, trans) ;

But immediately after creation of the Cube section of the size attributes closed
screen1.
how to modify the code to section size attributes (or any other ) was opened ?
screen2

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[Dan Rathbun]

Entity#get_attribute()

Entity#set_attribute()

The dictionary name is "dynamic_attributes"