How to manipulate reference image,

I just realized that that reference docker is gone, now. . . how do you manipulate the reference image? (resize, rotate, move it around etch)

I have read this documentation, but where are these option nested?

Reference images can be transformed via the menu offered through a click of the RMB. Additionally, you have the few options the Tool Option-Docker offers.

As reference docker I know “Reference Docker” from Antoine Roux updated by @SchrodingerCat what can be found here:

Here you find the original one:

And I know “Reference Tabs” @freyalupen published last September here in the forum, which I find very capable:

Michelist

Also, if you select it by clicking it, then move the cursor just outside a corner handle, you’ll get a rotation handle that you can free-rotate it with.
Then, using the RMB → Transform → Reset Transforms, you can undo that rotation.

You also have this plugin option

As for where those options are, it is a tool that only works with a active document on the canvas. It allows you to select and move the reference images around on the canvas.

I highly recommend Imagine Board, I use it a lot and it is one of the best plugins for handling references.