How can I convert 3d images to 2d?

?? images are always 2D
 
If you mean 3D models to 2D - there are a couple of options depending what type of data you have (e.g. the SNAPSHOT command, SOLVIEW/SOLDRAW, flattening a 3D drawing, etc) - see the Tips section.

go to ploter mangir and creat a "DXB" polter and plot whit this ploter . this ploter creat a DXB file and open a new file and type in comand line " DXBIN " then select dxb file .