The blueprint will appear in your hand, ready to be placed on the map. Useful Tips
To copy settings from one machine to another, use Shift + Right-click to copy, then Shift + Left-click to paste. factorio_enUS_1_1_74.zip
In Factorio, open the Library or click the Import string icon (a blue document icon) on the shortcut bar. The blueprint will appear in your hand, ready
Copy the long string of text (the blueprint data) from your file or source to your clipboard. use Shift + Right-click to copy
Press Ctrl+V (or Cmd+V on Mac) into the dialog box that appears.