To import photos from a digital camera:
Connect the camera to your computer and switch it on. Shotwell will detect it and list it in the sidebar.
Select the camera in the sidebar. Previews of each photo on the camera will be displayed.
If you like, you can choose a set of specific photos to import. To do this, hold down the Ctrl key and click to select individual photos. You can hold down Shift and click to select a range of photos too.
Click either Import Selected or Import All. The photos will be copied from the camera and saved on your computer.
Once the import is complete, you can open the Last Import view (in the sidebar) to see all photos that were imported. The Events list (also in the sidebar) will also show the new photos, organized by date.