Use Object and Polygonal options of MVIEW to create irregular viewports, Select Object option to convert objects created in paper space to viewports. While selecting Polygonal option to draw irregular polylines including arcs and lines which are enabled to either intersect or three vertexes at least, the polyline will be closed automatically to form irregular polygonal viewport.
To define viewport boundaries, the area in which selected objects are contained will be calculated, to set viewport objects on the corner of the boundary, and then clip the viewport according to the specified objects.
Polygonal option is used for creating irregular viewports according to specified points. With the same command prompts as creating polyline.
Redefine Viewport Boundary
Boundaries of viewports can be redefined by VPCLIP command.
Once selected the viewport to be clipped, you can specify existing objects as new boundary or specify new boundary point. You should notice that the boundary is neither displayed nor clipped if the layer on which the boundary of non-rectangular viewport locates. If you close the boundary layer rather than freeze it, the viewport will be clipped.
Edit Non-rectangular Viewports Using Grips
Like other geometrical objects, grips that are used to change the shape of non-rectangular viewports will be display once selected, with which you can edit the viewport as other objects. Such as move, rotate, scale and so on. To define viewport boundaries, the area in which selected objects are contained will be calculated, to set viewport objects on the corner of the boundary. Some geometric drawings may not be displayed entirely for different shape of the boundaies.
Scaling and Panning within Non-rectangular Viewports
Geometric drawings in model space will be clipped according to viewport boundaries when scaling and panning within non-rectangular viewports.
However, scaling or panning in rectangular viewports may not display objects outside the viewport boundaries.
If using Extents option in ZOOM command for the objects to be clipped within non-rectangular viewports, system scales the drawing according to the extents of clipping boundary, not all the geometric drawings are visible in non-rectangular viewport.
MVIEW: Controls the creation and display of layout viewports
VPCLIP: Clips a selected viewport boundary in Layout tab to conform to a user-drawn boundary
ZOOM: Sets layer visibility within viewports