How do the arrows inside the stairs?
Enter pl (polylihe), define the starting point width (0), define the endpoint width (size you own, can be 80, or 120), and then directly draw the arrow.
3. Enter! After the orthodox open! Drag down there will be a small arrow!
4. After the order with the L, in the small arrows after drawing a straight line ok!
1. Open cad, put the arrow to draw the map! Here to draw a mark on the corridor as an example!
2. Enter pl, then specify the starting point, here on the middle of the ladder! And then enter the h, and then enter the starting point of the half-width, because it is painted arrows, so here the starting point half width must enter 0, and then enter the input end of the half-width, where the input is 100,
