Stud.io - moving a single part (or a few parts) into a submodel?

[Corellian Corvette]

With LDD support gone, I need to re-train myself to start using Stud.io for my models. I'm starting with taking some of my existing builds and moving them over, and trying to re-create groups (submodels) and practicing making instructions.

There are some things in LDD that are just so *easy* from a usability standpoint and how LDD uses groups seems to be more intuitive. For instance, my models are all built with groups which is how I organize sections for instructions. 

I can see in Stud.io how to take a group of bricks and create a submodel. But, for the life of me, I cannot figure out how to add individual parts INTO the submodel once it's created. If I don't get EVERY single piece I wanted in a submodel the first time, there does not seem to be a way to add it. 

Let's say I've grabbed 49 pieces and created a submodel called "Stand". However, I forgot 1 piece. I cannot simply click on that piece and "add" to a submodel. And if go into the submodel, parts from the main model are transparent so I can't grab that piece from inside the submodel either. Dragging the piece from the step list doesn't let me put it in the submodel folder either. So I'm stumped. 

The way I build is that I basically start with an overall form, then break into submodels as I near completion. But I can't figure out how to mimic that workflow in Stud.io.

Any advice?

 

[anothergol]

You've got to cut the parts from outside the submodel, enter the submodel, & paste them. Kinda sucks, yeah, in that aspect I prefer the LDD grouping. But submodels also have their pro's.

You'd expect being able to move parts around in the model browser, from a parent to a submodel, but I don't think you can do that.