Orthanc server preview this series Help!

Hello Sebastien.
How to set the size of the preview series and display in the browser? Now I only have one button that when clicked shows a large image .
Thanks for your support

Hello,

The “preview” button in Orthanc Explorer is only a way to display a full-resolution preview of your images for low-level, administrative use:
https://book.orthanc-server.com/faq/improving-interface.html

If you want an actual Web viewer, check out the “Orthanc Web viewer” and “Osimis Web viewer” plugins:
https://www.orthanc-server.com/static.php?page=web-viewer

https://www.orthanc-server.com/static.php?page=osimis-web-viewer

HTH,
Sébastien-