Summary<\/strong><\/span><\/h2>\n\n\n\nKeep these distinctions in mind when handling PDF forms:<\/p>\n\n\n\n
\n- Interactive fields store entries; flat pages need added text or fields.<\/li>\n\n\n\n
- A visible signature and a digital signature serve different purposes.<\/li>\n\n\n\n
- Flattening fixes field appearances; certification makes subsequent changes detectable.<\/li>\n\n\n\n
- Sending a Sign Request creates a different record from sharing an attachment.<\/li>\n<\/ul>\n\n\n\n
These differences explain why two PDF documents that look identical can behave very differently.<\/p>\n\n\n\n![\"Exploded](\"https:\/\/www.dochub.com\/blog\/wp-content\/uploads\/2026\/11\/image-1-1024x683.png\")
A signed PDF is built in layers, and each one does a different job.<\/figcaption><\/figure>\n\n\n\nHow does entering information change a PDF?<\/strong><\/span><\/h2>\n\n\n\nA fillable form contains interactive objects, such as text fields and checkboxes. Each field has a location, a type, and a value. A printed box on a scanned PDF file is just part of the page image until a tool adds an interactive field on top of it.<\/p>\n\n\n\n
In DocHub, you can fill existing form fields or use the Text<\/strong> tool to place entries over a flat page. This adds content without having to recreate the scan. Use Manage Fields<\/strong> to create fillable fields<\/a> when other parties need to complete designated areas.<\/p>\n\n\n\nFor example, an administrator can place a one-time delivery reference over a scanned receipt. For recurring supplier onboarding, though, a reusable form with assigned fields is far more practical than positioning every answer by hand.<\/p>\n\n\n\n![\"DocHub](\"https:\/\/www.dochub.com\/blog\/wp-content\/uploads\/2026\/11\/image-2-1024x1024.png\")
Interactive fields define where recipients enter information; printed lines alone do not.<\/figcaption><\/figure>\n\n\n\nHow does the fill and sign process work in DocHub?<\/strong><\/span><\/h2>\n\n\n\nDocHub runs in a web browser on a computer or mobile device, including a Mac, without a desktop installation. Before you begin, have an authorized source copy, the required information, recipient details, and an internet connection ready.<\/p>\n\n\n\n
Use this short check to understand what each tool produces:<\/p>\n\n\n\n
\n- Upload a sample via New Document<\/strong> or by dragging it into the upload area. Click an existing field to test whether the page is interactive.<\/li>\n\n\n\n
- Add an entry with Text<\/strong>, then compare it with a value entered in a field. The overlay sits wherever you place it; the field provides a predefined entry area.<\/li>\n\n\n\n
- Open Sign<\/strong> to add your own signature. Move it into the correct location, then check the Download \/ Export<\/strong> settings to see how the output will be saved.<\/li>\n<\/ol>\n\n\n\n
Before you sign, review the information on every page. A signature line only marks a visible signing location; on its own, it doesn\u2019t assign recipients or authenticate anyone.<\/p>\n\n\n\n
What does the Sign tool actually create?<\/strong><\/span><\/h2>\n\n\n\nDocHub lets you draw a signature, type a name in a handwriting-style font, upload an image, or use your phone as a signature pad. With the phone option, a QR code or texted link connects your phone\u2019s input to your desktop session. For more details on signature creation, see our blog: How to create an electronic signature and add it to PDF<\/a>.<\/p>\n\n\n\nOnce created, the signature becomes an element you can place on the page. You can resize it, add initials<\/a> separately, and keep a saved signature in your account for future documents. Keep in mind that reusing its appearance doesn\u2019t, by itself, establish the signer\u2019s identity or consent to each new agreement.<\/p>\n\n\n\nIf your trackpad produces uneven handwriting, try the phone option. Review the result at normal zoom before completing the signed document.<\/p>\n\n\n\n![\"DocHub](\"https:\/\/www.dochub.com\/blog\/wp-content\/uploads\/2026\/11\/image.png\")
Signature creation controls the visible mark; the surrounding workflow supplies additional evidence.<\/figcaption><\/figure>\n\n\n\nWhat happens when you request signatures?<\/strong><\/span><\/h2>\n\n\n\nWhen you request signatures through DocHub<\/a>, fields are assigned to specific recipients. Before completing the document, signers agree to use electronic records and signatures. Learn more about handling multiple signature requests from our blog: How to add multiple signatures in eSign workflows.<\/a><\/p>\n\n\n\nDocHub\u2019s audit trail<\/a> records events, timestamps, email addresses, and technical details such as IP addresses. These records support attribution, though an IP address alone doesn\u2019t conclusively identify a person.<\/p>\n\n\n\nAfter everyone finalizes, PDFs from a Sign Request are automatically digitally certified<\/a>. Certification uses cryptographic information to help a compatible reader detect any later changes. It does not mean each signer received a personal digital certificate.<\/p>\n\n\n\nHow do saving, flattening, and certification differ?<\/strong><\/span><\/h2>\n\n\n\nSaving a completed form isn\u2019t the same as finishing a signing workflow. Choose output settings based on what recipients need to do next.<\/p>\n\n\n\n
These differences explain why two PDF documents that look identical can behave very differently.<\/p>\n\n\n\n A fillable form contains interactive objects, such as text fields and checkboxes. Each field has a location, a type, and a value. A printed box on a scanned PDF file is just part of the page image until a tool adds an interactive field on top of it.<\/p>\n\n\n\n In DocHub, you can fill existing form fields or use the Text<\/strong> tool to place entries over a flat page. This adds content without having to recreate the scan. Use Manage Fields<\/strong> to create fillable fields<\/a> when other parties need to complete designated areas.<\/p>\n\n\n\n For example, an administrator can place a one-time delivery reference over a scanned receipt. For recurring supplier onboarding, though, a reusable form with assigned fields is far more practical than positioning every answer by hand.<\/p>\n\n\n\n DocHub runs in a web browser on a computer or mobile device, including a Mac, without a desktop installation. Before you begin, have an authorized source copy, the required information, recipient details, and an internet connection ready.<\/p>\n\n\n\n Use this short check to understand what each tool produces:<\/p>\n\n\n\n Before you sign, review the information on every page. A signature line only marks a visible signing location; on its own, it doesn\u2019t assign recipients or authenticate anyone.<\/p>\n\n\n\n DocHub lets you draw a signature, type a name in a handwriting-style font, upload an image, or use your phone as a signature pad. With the phone option, a QR code or texted link connects your phone\u2019s input to your desktop session. For more details on signature creation, see our blog: How to create an electronic signature and add it to PDF<\/a>.<\/p>\n\n\n\n Once created, the signature becomes an element you can place on the page. You can resize it, add initials<\/a> separately, and keep a saved signature in your account for future documents. Keep in mind that reusing its appearance doesn\u2019t, by itself, establish the signer\u2019s identity or consent to each new agreement.<\/p>\n\n\n\n If your trackpad produces uneven handwriting, try the phone option. Review the result at normal zoom before completing the signed document.<\/p>\n\n\n\n When you request signatures through DocHub<\/a>, fields are assigned to specific recipients. Before completing the document, signers agree to use electronic records and signatures. Learn more about handling multiple signature requests from our blog: How to add multiple signatures in eSign workflows.<\/a><\/p>\n\n\n\n DocHub\u2019s audit trail<\/a> records events, timestamps, email addresses, and technical details such as IP addresses. These records support attribution, though an IP address alone doesn\u2019t conclusively identify a person.<\/p>\n\n\n\n After everyone finalizes, PDFs from a Sign Request are automatically digitally certified<\/a>. Certification uses cryptographic information to help a compatible reader detect any later changes. It does not mean each signer received a personal digital certificate.<\/p>\n\n\n\n Saving a completed form isn\u2019t the same as finishing a signing workflow. Choose output settings based on what recipients need to do next.<\/p>\n\n\n\nHow does entering information change a PDF?<\/strong><\/span><\/h2>\n\n\n\n
How does the fill and sign process work in DocHub?<\/strong><\/span><\/h2>\n\n\n\n
\n
What does the Sign tool actually create?<\/strong><\/span><\/h2>\n\n\n\n
What happens when you request signatures?<\/strong><\/span><\/h2>\n\n\n\n
How do saving, flattening, and certification differ?<\/strong><\/span><\/h2>\n\n\n\n
![\"DocHub](\"https:\/\/www.dochub.com\/blog\/wp-content\/uploads\/2026\/11\/image-3-1024x584.png\")