Tutorial
In this section, you will bring in the sketch that will be used as the basis of the final building. The sketch has been specially prepared by making it negative, and reducing the brightness and contrast. This makes it easier to see what you are doing when building on top of the sketch.
Incorporate the sketch as a background image:
Open modelfromsketch_01.max from the \tutorials\arch directory.
Verify that the Top viewport is active. If it isn't, right-click in the Top viewport to make it active.
If any floating toolbars appear over the viewports, close them or dock them so they are not in your way.
In the Viewport Image dialog > Background Source group, click Files.
In the Select Background Image dialog, select sketch.gif located in the \tutorials\arch directory, then click Open to close the dialog.
In the Viewport Background dialog > Aspect Ratio group, choose Match Bitmap. Also to its right turn on Lock Zoom/Pan if it isn't already on.
The image appears in the center of the viewport, but needs to be sized to fit the current viewport.