Hello! Children prompt how to make please what in PDF XChange Viewer (2.5 build 201.0) tools for measurement (the area, perimeter, length.) were considered in centimeters or millimeters. The version of the program another or to what нибудь the plug-in is necessary can at me? I already have tried all options have found only units, and rulers but it is displayed a grid on all document (((. I wait for a competent advice please!!!