The blueprint will appear in your hand, ready to be placed on the map. Useful Tips
Press Ctrl+V (or Cmd+V on Mac) into the dialog box that appears. factorio_enUS_1_1_74.zip
Use the 'b' key by default to open your blueprint books. 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. 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.
Here is how to prepare and import a blueprint string into your game: How to Import a Blueprint in Factorio