When set to "yes," this setting requires at least one label to be applied to a comment posted via the inline comment form. As indicated, the behavior in this case depends on two other settings:
1) If a label has been selected in Default Comment Label, it will be selected by default when a comment is created using the inline comment form.
2) If Show Label Selector in Inline Comment Form is set to "yes," the designated default label will be selected and the user can use the label selector to select alternate labels to be applied. If set to "no," the designated default comment label (if any) will be applied as the only label, unless the user opens the Article Editor window to access the label selector there.
