You can perform the following actions on a column header, or an aggregate label, in a summary table:
Edit the header or label text.
Modify the alignment of label text.
Format font properties.
Create a border for the label.
To modify a column header, or an aggregation label select the column header, and choose an option from the context menu. The context menu appears, as shown in Figure 6‑8.
Edit the header or label text.