Sign in with Dropbox to see the photographs and clips, mark each one for the video or the website, and record what each one shows.
Your marks and notes save into the same Dropbox folder as the photographs, so they travel with the files.
Choose the folder
Pick the folder that holds the material. Everything inside it, including subfolders, will be read.
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Or open a shared link
If you were sent a Dropbox link to the folder, paste it here. You can look through everything and export the spreadsheet; marks and notes can only be changed from the folder owner's account.