Issue I513 [enhancement,resolved] Allow workbench size to be non-integral or smaller than 1 mm^3. Prior to 8.1 early access mode (8.0.5-TEST26), workbench dimensions were forced to be integers in units of mm. This sometimes caused empty space around arrays even after minimizing the workbench ("Min" button on "Workbench" tab). This also implied a minimum workbench size of 1 mm^3, which could be bothersome when modeling, say, a portion of a nanoscale field emitter. A workaround, for the purpose of viewing, was to 3D zoom ("+Z3D") into a volume smaller than 1 mm^3. As of 8.1 early access mode (8.0.5-TEST26), the workbench dimensions can be non-integral. This affects the Workbench tab in View and the IOB file format. (Early access mode is described in Issue I421. You should preferrably place SIMION in early access mode prior to loading/saving the workbench.) WARNING: At the submicrometer inter-electrode distances, the Casimir effect can become significant.  http://en.wikipedia.org/wiki/Casimir_effect Compatibility note: IOB files with non-integral workbench sizes likely will load in earlier versions of SIMION though might give minor error messages upon attempts to further adjust the workbench size. Suggested by pypdjl-20081010-http://www.simion.com/discuss/viewtopic?p=2711 Implemented in 8.1 early access mode (8.0.5-TEST26). See also Issue I478.