thanks, i didn't know it was called freezing
this is from the help file for anyone else who is interested
Freezing Rows or Columns as Headers
If you have long rows or columns of data that extend beyond the viewable area of the spreadsheet, you can freeze them, which allows you to see the columns or rows as you scroll through the rest of the data.
1.Select the row below, or the column to the right of the row or column that you want to be in the frozen region. All rows above, or all columns to the left of the selection are frozen.
To freeze both horizontally and vertically, select the cell that is below the row and to the right of the column that you want to freeze.
2.Choose Window - Freeze.
To deactivate, choose Window - Freeze again.
note 1: If the area defined is to be scrollable, apply the Window - Split command.
note 2: If you want to print a certain row on all pages of a document, choose Format - Print ranges - Edit.