No Drag and Drop for Images

No, you cannot drag and drop, but you can link the stacks.

You can drag and drop an image in the image stack (not from the resources)
You can link the whole image stack (with the image in it) to a resource, to another page in the website, or link to another website.

You can highlight text in the text stack and link to a resource, to another page in the website, or link to another website.
You can insert in the text stack code for an image in the resources or on a server.

You can insert in the html stack code for an image in the resources or on a server.

But, you cannot drag and drop an image from the Resources … perhaps later with RW 7.x.x