User Problem

On the activity section of a card, if you open an image from there, there won't be arrows to move between the attachments

To test,

1. Add a comment with an image
2. Click on the image on the activity of the card (not on the attachment section)
3. You won't see an arrow 

4.  if you click on one of the arrow keys on your keyboard it'll move to the next card
    
    

I tested on an older version 205937 and there were arrows if you open an attachment from the activity section, and if you click on one of the arrow keys on your keyboard it'll move to the next attachment

Suggested Solutions

Add arrows to move between images from that card, and if you press one of the arrow keys it should move between attachments.

Current Workarounds

Open the file in the attachment section, it'll allow you to move between the attachments of that card using the arrow keys.