You have to upload all the graphics to either qualtrics graphics library or to some other image hosting website.
Then you can just use loop and merge question, with image URL as one of the loop and merge field. Pipe this field in the src tag of img tag.

Thanks rondev , do you know any code example?
Where exactly do I insert the code?

Best,
Coral

Once you have put the image url in loop and merge field (let say in field 1), in the HTML view of question, put the below code:

ok thanks,
there is a option to upload 2 images at a time? I want the participant to grade the similarity of 2 images in each question.
And, if I want that for each participant will be randomly displayed 100 images out of the 500?
Best,
Sheli

https://www.qualtrics.com/community/discussion/comment/29900#Comment_29900Yes we can show two images side by side. But again to randomly select 50 pair of images, its better to use javascript for this.

Hi Ron,

May I ask how to find this link? I could not access this link. I have the same issue as Coral has. May I ask how to insert 500 images into a repeated question? Thank you.