TimeLineBringing a book in
Import
A file is read here, shown to you in full, and saved only when you say so.
Choose a file
A spreadsheet (XLSX), or a flight recorder file (IGC).
The file is read in this browser. Nothing leaves it until you save, and the file itself is never uploaded.
Which sheet
These are the sheets in the file. Choose the one to read: only that one is opened, and the others stay closed.
Which column is what
The usual layout of this format is filled in already. Change a column only where your sheet differs.
The row the first entry is written on. Rows above it are read as headings and totals.