* for the preview box when posting a Whonix website link to the forums
* for the preview images when posting a Whonlx website link to social media (mostly facebook)
As per [ideal-image-sizes-social-media-posts](https://blog.bufferapp.com/ideal-image-sizes-social-media-posts) and recent successful test results.
* The first best image size for now appears to be `470x246`. Example page where this is working good with full size preview: https://www.whonix.org/wiki/Documentation
* The second best image size for now appears to be `158x158`. Example page where this is working good with half size preview: https://www.whonix.org/wiki/Tor_Controller
In the wiki markup, below
We need something like this:
|description=Using a Tor Controller with Whonix. Arm. Vidalia. Change your Tor circuit. Monitor Tor.
(The `description` appears as info text in search engine results below the page title. It can be anything and should be an informative summary. - Most pages should already have it.)
Look through existing files:
If we can reuse some, then we don't need new ones.
Or upload new suitable screnshots. Something that works as an illustrative image. Upload it.
Go to the image link. For example https://www.whonix.org/wiki/File:Tux.png. Don't use https://www.whonix.org/wiki/File:Tux.png directly! Won't work. Click on the image until you get a full size one, example: https://www.whonix.org/w/images/a/af/Tux.png.
The images does not have necessarily to be added to that wiki page. However, when it makes sense, then now is a good time to have at least one [illustrative] image [or sceenshot - if applicable] per documentation wiki page.
For simple cases of image resizing we can use mediawiki. Go to https://www.whonix.org/wiki/Dev/ImageResize. Add images to that page. Example:
Save. Mediawiki then will automatically created "thumbnails". Right click on the smaller image -> Copy Image Location. Example result: https://www.whonix.org/w/images/thumb/d/d5/Virtualbox_logo.png/156px-Virtualbox_logo.png.