Select a TSV row

Shift+Ctrl+Right Arrow

Select a TSV column

Shift+Ctrl+Down Arrow

Select a single cell to the left or right of the current cell

Shift+Right Arrow
Shift+Left Arrow

Select a single row above or below the current cell

Shift+Up Arrow
Shift+Down Arrow

Copy a TSV cell

Ctrl+c

Paste a TSV cell

Ctrl+v

Cut a TSV cell

Ctrl+x

Undo a cut, copy, or paste operation

Ctrl+z

Copy from Excel to a TSV cell

Ctrl+c and Ctrl+v