This is a feature-request to support easily uploading retina-resolution (i.e. double resolution) images and automatically showing them at half-size.
It is currently possible to do this, but it takes a lot of tedious manual work. Instead of using MarkDown, it's possible to use the
<img> which allows resizing.
The following line
<img src="https://i.stack.imgur.com/De4De.png" width="374">
will produce this:
While the image is
2*374 = 744 pixels wide, it's resized to 374 pixels on a standard screen and it's shown in high resolution on a retina screen. I use this method often in my posts.
This is a feature request to automate this procedure. For example, the image upload dialog could have a checkbox to indicate that an image should be inserted at half size:
On Mathematica.SE we have many users who use computers with retina screens and this has come up before. Some people are having difficulties with images being inserted at double size, others would simply like to be able to use high resolution images with relative ease.
If there are any existing non-official solutions, e.g. a userscript that automates this, please let me know!