How to Increase the Number of Rows and Columns in Design Mode

When creating a new sheet, the system provides 105 rows and 21 columns by default. However, the number of available rows and columns automatically adjusts based on the position of fields when the sheet is saved. The system adds 100 rows below the lowest field and 4 columns to the right of the rightmost field.

Examples:

1. If you add a field in cell A100 and save, the total number of rows expands from 105 to 200. If you later delete the field in A100 and save again, the row count returns to 105.

2. If you add a field in cell T1 (which also occupies U1), the total number of columns expands to 25 (extending to column Y). If you delete that field and save, the column count returns to 21.