Specifies a size of pages.
Object
The units property specifies the page's measurement units.
If you call the import method, it applies the imported page settings and the pageSize property is ignored.
Page settings are stored in a diagram model. The pageSize property is not in effect if the model is read-only (the readOnly property is set to true).
Specifies the page height.
Number
An array that specifies the page size items in the Page Size combobox on Properties Panel.
Array<Object>
Specifies the page width.