Who can tell me how in the CAD in A3 or A4 size open frame

Who can tell me how in the CAD in A3 or A4 size open frame

floor, open the A3 or A4 of the main frame? Is intended to draw the graph box? Draw frame in accordance with drawing specifications for size and width can be drawn in some graphics software, such as Tian Zheng, exploration, electronic charts ……are all readily available frame can be inserted, do not draw.

General CAD, direct select A3 or A4 template on it.

New, the default file type is.dwt select A3, A4 on the line.