Select this to use thumbnails that are found inside some file types (e. g. JPEG). This will increase speed and reduce disk usage. Deselect it if you have files that have been processed by programs which create inaccurate thumbnails, such as ImageMagick.
Dewiswch hwn i ddefnyddio rhagolygon cryno sydd i' w cael o fewn rhai mathau ffeil (e. e. JPEG). Bydd hyn yn cyflymu pethau ac yn lleihau defnydd disg. Datddewiswch hwn os oes gennych ffeiliau a grëwyd gan raglenni sy' n creu rhagolygon cryno gwallus, megis ImageMagick.