The packaged Bengalchirp-themetreats print as a complete reading surface,
not a screenshot of the screen layout.
When a reader prints a page or uses a browser's PDF destination, the theme:
- forces a white, high-contrast paper surface even from dark mode
- removes navigation, actions, overlays, and screen-only chrome
- expands tabs and closed disclosures, then restores their prior state
- replaces interactive embeds with a short online-version explanation
- uses the printable width on A4, Letter, and larger paper formats
- keeps short related blocks together but lets genuinely tall code, callout, card, and figure blocks paginate instead of clipping
- repeats table headers and keeps headings with the content they introduce
- underlines links and prints cleaned external URLs without tracking parameters
- appends the document title and canonical source URL
- normalizes visual emphasis into standards-compatible tagged-PDF text and restores the authored roles after printing
- remains legible with backgrounds disabled and in grayscale
Browser print dialogs control their own PDF feature set, so not every browser's “Save as PDF” output is guaranteed to be tagged. Chirp UI's repository proof generator explicitly requests Chromium's tagged-PDF and document-outline modes and verifies structure, text completeness, paper edges, and raster legibility across color, background-off, and grayscale scenarios.
The canonical implementation and contributor contract is
docs/theming/print-pdf.md.