Folders (also known as your Channels)
After channels, you have documents. Documents can have other documents created or nested below them - they can act as stand alone docs and folders.
Moving things around
Drag and drop
Just click and drag on the title of a doc in the left sidebar to move it. And we also have more info about dragging and dropping elements in Slite, over here.
Use the move function
Click on the three dot menu next to the title of a doc to Move it via the menu options.