How to freeze or lock panes in Excel
Description: What happens if you want to scroll down and see your rows of data, but when you get to the bottom of the screen, your column names in the top row have disappeared. To fix this, you freeze the top row so that it's always visible.
Good news – the command is easy to get to. Click View > Freeze Panes > Freeze Top Row.
You can freeze as many as you want, as long as you always start with the top row and the first column. To freeze multiple rows (starting with row 1), select the row below the last row you want frozen and click Freeze Panes. To freeze multiple columns, select the column to the right of the last column you want frozen and click Freeze Panes.
Say you want to freeze the top four rows and leftmost three columns. You'd select cell D5, and then click View> Freeze Panes> Freeze Panes. Any time you freeze rows and columns, the border below the last frozen row and to the right of the last frozen column appears a little thicker (here, below row 4 and to the right of column C).
To unfreeze panes Click View > Freeze Panes > Unfreeze Panes.
Watch the link below for more information.
Link: https://support.office.com/en-us/article/Freeze-or-lock-panes-789b3e23-edd7-4b6d-bfa3-b32983e3d5f4?ui=en-US&rs=en-US&ad=US