New and upcoming features of the RC.
There is a new type of editor in the RC: the block editor. Instead of tools that are positioned on a plane, the exposition consists of a single stack of blocks containing your content.
The big advantage of this simple block structure is that you can easily insert, move and remove content from the stack, without needing to update the position of the other tools. It also has some other benefits, like better readability on smaller screens.
A limitation is that it is harder to make free-form diagrams, but in that case you can just switch back to the graphical editor, since you can mix these two types of editor within one exposition. You can even copy your tools between the two varieties :-) !
If you need to put content next to each other (a row of three images for example), you can split a block into one or more collumns, by selecting a different layout when you create the block.
You can find a brief introduction video of the block editor in the workshop summary videos (number 4).