Definition of Theme. As a literary device, theme is the central topic or idea explored in a text.
I donât know if it has changed, but as for the Carousel ads, Facebook recommends 1800Ã1800 when i create a new ad. Hi Jon, I was previously able to replace the 470Ã246 thumbnail pulled from websites with an uploaded image on facebook.
These guidelines will help you select and edit your shared images for optimum quality: 1  Recommended upload size is 1,200 x 630 pixels. 2  Will appear with a maximum width of 470 pixels in Facebook feed. 3  Will appear on a Facebook page with a maximum width of 504 pixels.