Working with wide tables with textual data, especially on wide monitors, can be troublesome if you need control and visually compare the values of cells separated by many columns or rows.
The "Cross-Highlighting" function in GS-Calc can make it much easier. The current row (or column), optionally with a number of rows (or columns) below and/or above (or to left and/or right), can displayed with a brighter background.

To activate this function, use the View > Toggle Cross-Highlighting On/Off.
To change the parameters, the number of highlighted rows/columns and the contrast between them and the rest of the worksheet window, click View > Toggle Cross-Highlighting Options. You can also use the corresponding toolbar button.