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A `tb` (or `lr-tb`, `table`) subform that is a cell of a table row was laid out at the height it gives itself, even when its content is much shorter, so the rows after it and the next section were pushed down, onto an extra page on a public form. Adobe Acrobat and PDF-XChange Editor both lay such a cell out as tall as its content, although a height makes a container fixed (XFA 3.3 p. 275); this follows them. A positioned cell, and a flowed subform outside a table, keep their heights. `measure`'s content height moves into `content_height` so both can use it. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CBVyQEwtmEw3mS1MoAiwrK