Go to the artwork detail page of the work you want to upload images for
Scroll down to the section Dossier and click on the Add button.
Now you can choose to either Add media or Upload media.
Click on Upload media to upload images from your computer. You can then choose one or multiple image files from your hard drive. Confirm your choice to upload the images to the dossier.
Click on Add media if the images are already located in your archive and you want to move them to the artwork dossier. An overlay will open and search for the desired resource using the filters of the archive search. Choose the images by clicking on them. To confirm your choice click on Select in the bottom right corner.