Borders & Sidebars
Collapsible left, right, and bottom edge panels.
Border panels
Borders are collapsible panels docked to the edges of the layout — think VS Code's Explorer, Search, and Terminal. They live in the top-level borders list, each with a location of "left", "right", or "bottom" (there is no top border).
Border tabs start collapsed; click a tab name on an edge to slide the panel open, and click again to collapse it.
Notes
sizesets the panel's width (left/right) or height (bottom) in pixels.borderSize/borderMinSizeinglobalset defaults across all borders.- Each border can hold multiple tabs (the left border above stacks Explorer and Search).
Source: /borders