Renumbering grid lines after importing a dxf

Question:
I have imported a dxf file to use as a grid and find the grids are all numbered numerically. Is there a way to renumber the grid lines without editing each line?

Answer:
Yes, the following example will take you through importing the grid, changing the numbering format and finally renumbering the grid.

Example

Importing the grid
When importing a dxf file as an Architural Grid, all of the lines are numbered numerically (1,2,3...) by default. These can be changed to have a series of selected lines numbered alphanumerically (A,B,C...).

Note: The grids are numbered in the order they are drawn.  Also, the grid directions are taken based on the direction they are drawn in. Although the latter point is not critical to this FAQ take note that it can affect the way grid labels are displayed and also the direction a frame may be shown in a frame view.

Changing the numbering format
For this example we want to have the Dir 2 grid lines (1, 2, 8, 3, 17, 9, 10, 11 & 12) labelled "A" to "I".

1. Select the lines in the order you want them to be numbered (left to right).

2. In the Properties window set the Grid Name Type to Alphanumeric

3. In the Structure tree simply right click over Architectural Grids and select Renumber

The result
The grids should now be numbered as expected. Note the 0 and 45 degree grid lines have been renumbered numerically based on the order they were drawn, if in your example they are not drawn in order please select them in order repeating the steps above (keep numbering types as Numeric).