If music font (e.g., Maestro) is specified for ending repeat markings (Document > Document Options > Fonts > Text > Ending Repeat) in order to provide time-signature-style numerals for volta brackets (see Gould p. 236) and Document > Document Options > Repeats > Add period after number is checked, then those periods appear misplaced because of conventional character baselines in music fonts.
Currently Finale does not provide an ability to correct this spacing.
- Uncheck Add period after number and provide period stop as text expression. This solution is not compatible with automatic music spacing: if the width of the bar is changed the spacing must be corrected manually.
- Forge custom font with modified glyphs (e.g. corrected baselines). This solution is more robust but requires some technical know-how and may be somewhat illegal: as a rule third-party font licenses disallow modifications of the font.
Provide Horizontal Offset and Vertical Offset options for periods in Document > Document Options > Repeats. Those settings would be enough for my particular issue, though more extensive customization options may be considered, such as modifying period character size, selecting glyph, or even font.