Delete White Frames sorround thumbnails

[Nolletsac]

These images have a white extra edge (or frame, I mean the one wih the magnifying glass icon), I need to know how to hide or deleted it or turn it trasparent? I mean I wanna see just the images with their own names below the thumbnail...



I wanna delete those white things... how????


PD
Sorry about my english.. it is noy my first language

[Benno]

Hi,
see: https://www.phoca.cz/documents/2-phoca-g ... ound-image
Kind regards,
Benno