Use Stackup Visualizer to design, view or modify a PCB stack up in multiple visualization modes including tablature, cross section and 3D. Drag and drop layers to interactively change layer order. Assign construction materials and set attributes such as layer thickness or dielectric constant. Interactively define and view drill spans and via technologies including backdrills. Use export and import functions to exchange stack up design details with a manufacturer and update the stackup with material or other changes.