A [[MetaProperty]] must be made editable,not only to get them displayed on the client but also be able to edit.
# [[Create_a_new_MetaClass|Create]] a new a Document [[MetaClass]] derived from the System MetaClass "[[FILEDOCUMENT]]
# [[Create_a_new_MetaProperty|Create]] a [[MetaProperty]] of type "[[MetaProperty#Boolean|Boolean]]" with the Name "EDIT_FILE_ALLOWED"
# Navigate to the [[MetaClass]] [[SYSCLS_EDITABLEDOCUMENT]] in the ''[[Class Browser]]''<br/>[[File:UI_Document_editable_01.png|330 px|border|alt=Property editable|Property editable]]