Hi! You have this keybindings:
workbench.action.joinTwoGroups - alt+cmd+1
workbench.action.splitEditor - alt+cmd+2
But I think the following keybindings would be more correct:
workbench.action.editorLayoutSingle - alt+cmd+1
workbench.action.editorLayoutTwoColumns - alt+cmd+2
Because the "split" features (unlike the "layout" features) duplicates the open file into a new column, and the Sublime does not.
And besides, you can add a few more keybindings for editor layout like Sublime:
workbench.action.editorLayoutThreeColumns - alt+cmd+3
workbench.action.editorLayoutTwoByTwoGrid - alt+cmd+5 (though I would write here alt+cmd+4)

Hi! You have this keybindings:
workbench.action.joinTwoGroups-alt+cmd+1workbench.action.splitEditor-alt+cmd+2But I think the following keybindings would be more correct:
workbench.action.editorLayoutSingle-alt+cmd+1workbench.action.editorLayoutTwoColumns-alt+cmd+2Because the "split" features (unlike the "layout" features) duplicates the open file into a new column, and the Sublime does not.
And besides, you can add a few more keybindings for editor layout like Sublime:
workbench.action.editorLayoutThreeColumns-alt+cmd+3workbench.action.editorLayoutTwoByTwoGrid-alt+cmd+5(though I would write herealt+cmd+4)