Beside another Hard 90 it snaps to 90° (45° each). Never 90° to normal panels.
Soft 90
Turns 90° over 250mm
Select panels, or choose a panel type, to see its options.
Screen position
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WHm
Wiring plan
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Click place / select · Alt new screen on floor · Drag orbit 1–5 panel type · V/Esc/0 select tool R rotate · F flip · Q/E turn screen (Shift fine) ←↑↓→ move (Shift ×4) · Del delete · T stack Ctrl+Z undo · A all · C/X/V copy/cut/paste Tab full screen — hides all UI, Tab again to return