0

Off.

1

Permanent: If the option is set to Permanent (?tyakmid=1) then the width of the character will be changed to the value of the width of the Yakumono character and space will be stripped (or added) from before or after the character depending on whether it is Yakumono-before or Yakumono-after.

2

To Fit Proportionally: Just enough space is removed from the Yakumono character to ensure that the line fits. All Yakumono characters that are set to proportional are squashed evenly, but only after any countback squashing has occurred.

3

To Fit Countback: This is the more traditional way of squashing a line. Yakumono characters are squashed fully, one at a time, until the line fits. End-of-line Yakumono is squashed first, then start of line and finally mid-line, squashing each character in turn, working backwards from the end of the line. If the line still needs squashing further then any characters set to proportional will be then be squashed.