I am looking to create a drawing in line with BS 8888. Using the standard drawing template the numbers are ordered from the right to the left and the lettering is ordered from the bottom to top (see attached image). However BS 8888 states that "[t]he sheets shall be divided into fields in order to permit easy location of details, additions, revisions, etc. on the drawing. The individual fields shall be referenced from the top downwards with capital letters (I and O shall not be used) and from left to right with numerals. For the size A4, they shall be located only at the top and the right side". This may be a simple question but how would I order the numbers and letters in the correct way?