autocad layout 不同scale on same dwg,

Switch to layout
Draw a rectangle from 0,0 to 841,594 (A1 size) -> Zoom extend -> Command : mview (make a rectagle shape viewport) -> Double click inside the viewport (go to model space) -> Zoom to the position you want to display -> Double click outside the viewport (go back to paper space) -> Select the viewport and right click and click properties -> You can see a dialog dox appear -> Under the title "Misc", Change "Standand scale" or "Custom scale" to make difference scale -> Stretch the viewport to fit content in the viewport