Notice that, while tagging, either the first column or first row of the TAGS pane is displayed with a bright green highlight.
As mentioned earlier, it’s not necessary to enter the row number when entries in a TAGS tab only use the first row (row 0).
A single digit suffices to identify the desired tag in this case. Often, though, two digits are required to fully identify a specific tag.
The green highlighting in the TAGS tables provide visual cues to tell you which number you need to enter next. If the row numbers are highlighted, you know that a row number is required. After a row number is entered, column numbers are highlighted. (In Figure 148, a row number – 3 – has been entered; the TAGS pane patiently awaits a column number.)