[Inkscape-user] Crop tool?

In Gimp one can "flatten" a document to put all layers and all pieces into one object. Once this is done one can crop to a segment of the object and if needed enlarge it to a new size. I need those steps or equivalent to create a multi page (and more readable) version of the help document "keys.svg. "

What are the Inkscape analogs of flatten and crop?