I'm using Alfresco Community v5.2.0 to store some files (pdf, jpg/png essentially).
I'm creating a web app to retrieve this files for a school project.
I'm trying to create a grid of files from a specific folder in my application. But when i'm retrieving the list of a specific folders with their thumbnails, the resolution of the thumbnail is very low (100x75).
How to configure Alfresco to generate a larger thumbnail ?
Where did you find the idea to modify / put the thumbnail.xsl there? This has nothing to do with the thumnail resolutions and is only related to displaying a CMIS-based file system view (as far as I can tell).
Alfresco thumbnails are defined in the thumbnail-service-context.xml (and can be overriden via a Spring bean context file in the shared/alfresco/extension/... path) - you can see the default definitions in the source file. You could add a custom thumbnail definition in your own Spring context file, and retrieve thumbnails created according to that definition for your project.