LibreOfficeDev 24.2 Help
Hides selected rows, columns or individual sheets.
A break in the row or column header indicates whether the row or column is hidden.
To display hidden rows, columns or sheets
Select the range that includes the hidden objects. You can also use the box in the corner above row 1 and beside column A. For sheets, this step is not necessary.
Choose Format - Rows/Columns - Show or Format - Sheet - Show.