HI ​@Denis Lucet 

Yes, you can change the thumbnail of your custom template in Miro. After you’ve created your template, follow these steps:

• Open the template from Explore Templates
   

  

   

• Click on the template name at the top of the screen

• Select “Change thumbnail”

• 

  You can then:

  • Upload a custom image

  • Select a board area to be shown as the thumbnail

  

This allows you to give your template a more recognizable or branded visual, especially helpful if you’ve created multiple templates.

Thanks ​@Eca 
I was interested in keeping the same thumbnail from the original board when I create a template but hopefully when the template’s thumbnail will be updated, the boards generated from the template will keep the same thumbnail as the template. I will test this.