8. Spans

A span refers to a set of contiguous columns (colspan) or rows (rowspan), and consists of two values, the start and end values of the set, separated by a colon. Spans are only used by the format, hide, and show commands.

A colspan may be specified using column letters, or column numbers preceeded with the letter C (or c). For example, b:d, d:b, c1:3 and c3:1 are all equivalent and specify columns B, C, D.

A rowspan is specified using row numbers, optionally preceeded with the letter R (or r). For example, r2:4, r4:2, 2:4, and 4:2 are all equivalent and specify rows 2, 3, 4.