LDTViewer is a GDS/OASIS layout viewer. It has easy navigation (zoom in/out, pan), measuring mode.
It is specifically designed to handle large files.
Here are some key features of "LDTViewer":
fast and selective loading of large stream files
intuitive navigation (zoom, panning, scaling)
measuring distances
customized filtering (by color, filling, outline)
view the cells hierarchy
various array modes
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