All actions on the sheet are performed within the workspace. Documents created in MyOffice Spreadsheet have a default workspace of 26 columns and 300 rows.
The workspace borders are extended automatically if copied rows or columns are pasted onto the sheet and the number of which exceeds the number of rows or columns in the workspace.
To expand the workspace manually, do one of the following:
–Double-click to select any cell in the row or column to be included in the workspace.
–Right-click the row/column header to be included in the workspace and run Add rows: n/Add columns: n from the context menu.

–Select any cell in the last row. To expand the workspace by one or more rows, press Enter.
–Select any cell in the last column. To expand the workspace by one or more columns, press Tab.