PloComp is viewer which views in piles, or arranges and views plural PDF/HPGL/image drawing files, and there are following functions. (1) High-speed displaying of vector drawing, and many commands about displaying (2) Display a maximum of 15 plural drawings in piles, or arrange and display. Displaying ON/OFF of the piled-up drawing is carried out per drawing. (3) Drawing comparison by different colors (4) Compare two drawings and add cloud mark automatic to change area (5) Color and width change of line, whole drawing black and white / color change, background color change, pen ON/OFF (6) Mode(Merge command of overwrite / mixed color / difference writing / data) change of drawing (7) Rotation, mirror, grid displaying (8) Thumbnail displaying (9) Vector font / TrueType font change of character font (10) Measurement function of coordinates, length, line width, and angle (11) Character search (12) Connected line search, the total line length measurement (13) Comment (straight line, free form curve, cloud mark, rectangle, ellipse, character) insertion edit (14) Black and white/color copy to clipboard (15) Support to many file formats Input:PDF,HPGL,HP-GL/2,HP RTL,EMF,TIFF,JPEG,Bitmap,PCX,FPX,PNG Output:PDF,HP-GL/2,EMF,TIFF,DXF,JPEG,Bitmap,IGES,Printer,Plotter (WMF,EMF,PS,EPS,SVG,XPS,HP-GL/2@HP RTL,PCL):( ) is converted from PDF (16) Page composition of PDF, HPGL, and TIFF output - Output inputted plural drawings to 1-page one file in piles. - Output each drawing to one file by two or more pages on 1 page of 1 drawing.