Common questions about Replace and Insert Symbols usually focus on unavailable buttons, removing marks, and editing scanned PDFs; this section includes 4 frequent questions and a glossary.
FAQ
Why is the Replace or Insert Symbols button grayed out?
- Make sure the PDF is already in Edit Content and Text Editing mode.
- Make sure you have selected actual text content.
- If the button is still unavailable, check whether your account has the required PDF editing membership access.
How do I remove a replacement mark that I already applied?
- In text editing mode, select the text that already has the mark.
- Click Replace again.
- Confirm that the mark is removed, then save the document.
Why can’t I use this feature directly on a scanned PDF?
- Text in a scanned PDF is usually stored as an image instead of editable text.
- Run OCR first to convert the image text into editable text.
- After OCR is complete, enter text editing mode and apply the related marks.
Can I combine this with other text formatting?
- Select the target text first.
- Apply other text formatting such as bold, italic, or underline as needed.
- Check whether the combined display matches your revision needs.
Glossary
| Term | Definition |
|---|---|
| Replacement mark | A text effect used to show that existing text should be replaced or removed. |
| Insertion mark | A revision mark used to show where new content should be added. |
| Text editing mode | The editing state in a PDF where text can be selected and modified directly. |
| OCR | Optical character recognition used to convert image-based text in scanned files into editable text. |