X_BTWN_FORM_SPACE is a [fixed lexicon] with the following values:\\

%%zebra-table
||Saved\\Value||Displayed Value
| 0 | 0 line space
| 1 | 1/5 line space
| 2 | 2/5 line space
| 3 | 3/5 line space
| 4 | 4/5 line space
| 5 | 1line space
%%