Table and clear buttons.

Columns:
  1. Numbers (editable, semi-automatic). Alternatively, an index column is displayable.
  2. Time values. Counted values normally are inserted after the last value found in this column. Also accepts floating-point numbers.
  3. Operator column.
  4. Results or custom Items. "Lock Items" prevents to clear this column, even if a new file is created.
Time operators: 
< forces the next timer value to be inserted in this row
> forces timer values not to be inserted in this row
y years
d days
h hours
m minutes
s seconds
ms   milliseconds
Selection operators (default):
x single row or beginning of a row span
y end of a row span (inclusive)
z target for moved or copied rows
Characters appended to values:
f protects a number against automatic conversion.
d degree value
r radians value