Left-oriented tabulator:
print the following information at X position "xxx" (relative to the left border of
the status bar).
Example: $x(300)$sK will always print the total size of the selected
objects at X position 300.
$x(-xxx)
like before, but relative to the right border of
the status bar.
Example: $x(-150)$sK will print the total size of the selected objects
at X position 100, if the status bar is currently 250 pixels wide.
$x(xx%)
like before, but the X position will be calculated
using "xx" as a percentage relative to the current width of the status bar.
Example: $x(50%)$sK will always print the total size of the selected
objects in the center of the status bar.