You can add dummy images or provide hosted images. Surfer does not provide uploading images from your computer.
You can add images that are hosted - if you copy and paste an existing article then the image will appear in the editor. Images that are waiting on your laptop to be put on a page should be placed as dummy images. Surfer will count the content in your ALT tags, try adding a placeholder and write the alt tags there.
Remember that you can add an image to your draft in Google Documents using our extension!