I guess I didn't specify clearly enough. All of these questions are in regards to number lines using UEB braille symbols - not tactile graphic number lines. That's why I put this in UEB Technical. I know that it's frequently better to use tactile graphics, but that's not always a valid option. The problem is that there's basically no information about number lines in Guidelines for Technical Materials. It does not tell us how to divide a number line between braille lines. Do we just cut it off? Do we use the line continuation indicator? Does the runover start two cells to the right (or is it based on the format of the surrounding material)? I know a number line can theoretically have a runover. But we still don't have any information on how to make the runover (among many other important things).