And another question : why the thumbnails are in 96dpi and not 72 ?

Thank you for your response. I actually already modified td_block__1.php, my problem is that if i remove posts from there, i’m looping over a limited number of posts, and i ended up displaying less posts than supposed for the design.
That number being defined upstream, while creating the post’s loop for that specific block.
So my question is : Can i have any action on the building of the loop via the API (not on how it’s displayed, this part i got it) or is this a customization of the theme that needs to be done in that case ?
Thanks