`joinTwoGroups` and `toggleEditorGroupLayout`
`joinTwoGroups` and `toggleEditorGroupLayout`

SublimeText uses `SHIFT+ALT+` 1 through 4 to split the layout vertically into 1, 2, 3 or 4 panels. `SHIFT+ALT+5` to split it into 4 panels distributed vertically 2 by 2. `SHIT+ALT+8` to split into 2 horizontal panels and `SHIFT+ALT+9` to 3. So I tried to do the best into implementing both horizontal and vertical layouts.
Microsoft/vscode-sublime-keybindings,Microsoft/vscode-sublime-keybindings