Sets the text in either subscript or superscript.

Allowed values: subscript, superscript and 'normal'.

Applies to:

• configureAsBlock

• configureAsLine

• configureAsFrameWithBlock

• configureAsFrameWithBreakableBlock

• configureAsTitleFrame

• configureAsGroupWithBlock

• configureAsGroupWithLine

• configureAsInlineFormatting

• configureAsInlineFrame

• configureAsInlineAnchorToStructureWithBlock

• configureAsInlineAnchorToStructureWithLine

• configureAsInlineAnchorToStructure