The Cura 3D printing software is made by Ultimaker, the 3D printer manufacturer.
When you install the application create a profile for your printer. The user’s guide or data sheet of you printer should contain the necessary information to populate the form.
The save button is not enabled
The design is loaded into the program, but the Save button is not enabled.
When the design is larger than the maximum size your printer is able to print the Save button is grayed out.
Load a smaller design or reduce the size of the object.