The program for converting DWG, DXF, DWF formats to graphical formats, for example BMP, JPEG, can also be in PDF documents, download Acme CAD Converter can be lower. 
The appearance of the program is as simple as possible, you can add the file through the menu or by transferring it to the main window. Next with your file you can work, change the scale, switch to full screen mode and so on. You can change the background color, edit the font, add watermarks