Use Tables - Ctrl + T Then add Slicers to make filtering easier, finally use the sequential shortcut Alt then A, then C to clear filters. Remember Alt All Clear!

A handy little tip from the Paste options in Excel Copy then Paste and select the Transpose option. It doesn't work if you Cut - only Copy and not next door - select a cell underneath or on a new sheet.

Using Tab and Shift and Tab you can quickly change levels for your outline numbering. Tab moves forward and Shift and Tab moves you back a level.