Image display of products

Hey I have for each product 3 o 4 images with their thumbnails displaying correctly. The thing is when i click on a thumbnail to zoom I have then to close the image and open another thumb to see the next image. Is there an option to add next / prev buttons when you are on the big images? Or an extension? I dont want another gallery or display, just be able to pass through the images in a simpler way. the images Sorry I don't attach link but I'm working locally.

That is component of virtuemart itself, maybe there are 3rd party expansions that extend it's behavior.

Ok thank you. I've been looking all day and the extensions I found are for earlier VM versions (mine is 2.0.16) and then the other solution I found is to install VM 2.0.18 which I read brings by default this feature but when I try to update I get an error "copy failed".. and no solution found for this yet.

Maybe write access if problem, check CHMOD on files and folders on your site.