Vicain

I've uploaded a large file into cura and it fully loaded, but due to the size of the object is appears massive. This object is so massive it cannot be selected to be scaled down. I had this object in Autodesk Maya and made it as small as I could before exporting it as an OBJ file. Is the a command in cura i can use that would select all objects allowing me to scale this down? please help. The bund of shanghai.obj