NNBUilder
Variables
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Tools[S] Selection rect[C] Connect mode[Esc] Cancel tool / pending connEdit[R] Rotate selected 90°[Del / ⌫] Delete selected[Ctrl+Z] Undo[Ctrl+Y] Redo[Ctrl+C/V/X] Copy / Paste / CutView[Drag canvas] Pan[Scroll] Zoom