Install a PDF editing library or tool that supports writing/creating PDFs (e.g., Adobe Acrobat, LibreOffice Draw, PDFtk, iText, PDFBox).
Create a new PDF document (blank or template-based).
Add pages to the PDF.
Add text fields or form fields (if you need user input).
Add annotations (e.g., text notes, highlights) if you need non-form writable elements.
Set font, size, color, and positioning for all text elements.
Define field properties (read-only vs writable, required, default values, validation rules).
Save the PDF as a new file (not as a flattened/uneditable export) to preserve editability.
If using a form workflow, ensure the PDF is saved with AcroForm/XFA settings compatible with your target viewer.
Test the PDF in the intended PDF viewer (Adobe Acrobat/Reader, browser PDF viewer, mobile app) to confirm fields are writable.
If needed, flatten only after collecting input (flattening removes editability).
Distribute the PDF and confirm write permissions in the environment where it will be edited (local file vs web-based viewer).