Selection
Click adds. Shift-click removes. Left → right selects fully enclosed objects; right → left selects anything touched. Drag a box or click its two corners. Blue grips move objects or line endpoints. The template border stays protected.
Keyboard
Ctrl / ⌘: A select all, C copy, X cut, V paste, Z undo, Y redo, S save project, O open, N new, P PDF, 1 properties, 3 library, 9 command line, 0 clean screen.
Delete erases. Middle-button drag pans; wheel zooms.
Function keys
F1 help · F2 history · F3 object snap · F7 grid · F8 Ortho · F9 grid snap · F10 polar guides · F12 coordinate readout. All have on-screen buttons.
Coordinates
x,y is absolute; @dx,dy is relative; @distance<angle is polar. Origin is the sheet’s top-left; positive Y points up. Units describe the schematic, not physical pipe lengths.
This P&ID editor supports the 2D commands listed here, not the full AutoCAD command set. 3D, lasso selection, object snap tracking, pattern hatches, fillets, chamfers, arrays, blocks, and DWG round-trip editing are not available. The clipboard is within this page. Browser or operating-system shortcuts may take priority; use the command bar or on-screen controls in that case.