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The Merge Boxes, Polys Button: Automatic Box/Poly Merging

When this button is set, new boxes and polygons that are created with the side menu commands are merged with existing boxes and polygons to form a larger polygon in the database. New wires will be connected to existing wires on the same layer with the same width, but do not participate in the box/polygon merging of new objects.

However, on layers with the NoMerge technology file keyword set, merging is always suppressed.

The state of this button tracks the logically inverted state of the boolean variable NoMergeObjects, which can (equivalently) be set with the !set command.

Existing objects can be similarly joined, or split into trapezoids, whith the buttons in the Join Boxes, Polygons panel brought up with the Join button in the Edit Menu.

Join (merging) operations are subject to the settings of several variables (e.g., JoinMaxPolyVerts), which have equivalent entries in the Join Boxes, Polygons panel. These limit the complexity of polygons created by merging, mostly for optimizing for speed for merging large object collections.

The Merge, Clip Boxes Only button in the Edit Menu modifies the merging behavior to clip and merge boxes only.

This object merging is separate and unrelated to the box merging available when reading a layout file into the database, which has a separate merging control in the Set Import Parameters panel.


next up previous contents index
Next: The Merge, Clip Boxes Up: The Edit Menu: Edit Previous: The Constrain 45 Button:   Contents   Index
Stephen R. Whiteley 2012-04-01