WordPress Theme Preview Image

I’m developing a custom WordPress theme. When I go to select themes in the Appearance menu, my theme does not have a preview image. Is there something I need to do to get a preview image to show up? I can’t find any resources on the web that talk about this. Maybe I’m just searching the wrong thing though…?

2

There is no automatic preview. You need to create the screenshot yourself and place it in the theme/child theme folder named screenshot.png

The recommended image size (currently) is 1200px wide by 900px tall, however the screenshot will only be shown as 387×290. It is over-sized to allow for high-resolution viewing on HiDPI displays. Note that as of version 4.7.4, the bottom ~18% of this image will be cutoff so keep logos or other graphics centered.

For the latest info see:
http://codex.wordpress.org/Theme_Development#Screenshot

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