Place a background image in custom extension

[Pierre-Philippe]

Hello Airtable community,

I'm developping a custom extension for my base. I would like to put in background of the an image.

I've tried with a stylesheet without success actually. 

Is there a way to do it ?

Many thanks,

PP

[Steve_Haysom]

I have done this with css, here's an example:

.backgroundDiv {
   background:url(https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png)
}