How to delete pictures from dropbox?

if you want to delete all photos in dropbox, press command A (select all) and right click delete. 

... Go to dropbox.com. Log in. Delete. Installing the Dropbox client is ... folder. Wait whilst Dropbox downloads the entire contents ... folder. Synchronise Dropbox - whereby it deletes the photo on ...  

... or anything else from your Dropbox account is to install the ... website and delete the photo from your account.