Article Categories
Installation / Registration
- Qoppa’s PDF Editor Now Available on NixOS Linux Distribution
- X11GraphicsEnvironment error when installing PDF Studio as root on Linux
- License Key Management for Volume (Multi Users / Multi Key) Licenses
- MacOS: Invalid Checksum Error on Update Install
- Where can I find PDF Studio Installer (install4j) Logs?
Troubleshooting
- Jaggedy Ugly Fonts in PDF Studio on Arch Linux & Manjaro KDE
- Error opening documents from Dropbox “Received fatal alert: protocol_version”
- “Com Surrogate has stopped working” error on Windows 7
- Icons not scaling correctly on Manjaro OS running 4k
- Missing Text / Fonts in PDF Studio on Arch Linux & Manjaro KDE
Converting PDFs
- How to Convert PDF to Word with Office 365 from PDF Studio
- How can I Convert Several Excel Sheets as a Single PDF?
- How to extract a table in a PDF to CSV & Excel
- Convert text file to PDF with page breaks / new pages / support for character 12 form feed
- How to combine multiple files into a single PDF
Creating PDFs
- Easy Tools to Add Content Objects on PDF Page
- Video: How to Convert an Excel Sheet Into a PDF using PDF Studio
- Error Adding Images – no such file or directory – when scanning on Linux
- Video: How to Convert a Word Document into a PDF using PDF Studio
- Video: How to Convert a PowerPoint File Into a PDF using PDF Studio
Digital Signatures
- How to solve “Signature hash will not fit in allotted space. Increase timestamp server length estimate” error
- What Timestamp Servers to Use when Signing PDF Documents
- “Fast Sign” Signature Stamps
- Creating Self-Signed Digital IDs for signing PDF documents
- How to Avoid Adobe Appearance Integrity Report To Show Digital Signature as Invalid
Fonts
- Jaggedy Ugly Fonts in PDF Studio on Arch Linux & Manjaro KDE
- Font Replacement / Substitution Defaults when Converting to PDF & PDF/A
- Undefined Chinese Japanese and Korean Characters under PDF Bookmarks
- Missing Text / Fonts in PDF Studio on Arch Linux & Manjaro KDE
- Fonts not showing up in properties list
Interactive Forms
- Make a PDF form field change text to uppercase while typing using a JavaScript action
- XFA Forms Deprecated in PDF 2.0
- Simple example of JavaScript to calculate time difference in a PDF in hours and minutes
- How Do I Size Form Fields when Designing an Interactive Form?
- How to create a button in a PDF form to send an email with form attached
Security
- CVE-2021-44228 – Apache Log4j Vulnerability
- How to set document permissions so that other people cannot edit my JavaScript
- “The signature contains a timestamp (…) that is not trusted” displays on signature validation status dialog
- Is there a way to set an expiration date on a PDF document?
- PDF digital signatures validation status
