PDF Editing Issues

How to Change Font Size and Table Lines in Adobe Acrobat X Pro

Jason MillerJason Miller Oct 28, 2026 869 views

Question details

The user needs to know how to adjust the font size within a PDF document and fix table grid lines or borders that are not appearing black.

How to Change Font Size and Table Lines in Adobe Acrobat X Pro
Product
Adobe Acrobat X Pro
Device & OS
not provided
Scenario
Editing form field properties and attempting to modify standard document layout elements like tables.
Observed behavior
The user cannot easily change the font size, and table lines appear uneditable or do not display correctly as solid black borders.
Before you start

Determine whether your PDF is an interactive fillable form or a standard flattened document, as the steps to modify font sizes and layouts differ significantly between the two.

Solution 1Recommended

Change Font Size in Interactive Form Fields

Use this method if you are working with an interactive PDF form and need to adjust the text properties of specific fillable fields.

When working with fillable forms in Acrobat X Pro, text formatting is controlled by the individual field properties rather than the general document text settings.

1
Open Prepare Form Tool

Navigate to your Tools pane and select 'Prepare Form' to enter the interactive form editing mode.

2
Access Field Properties

Right-click on the specific form field you want to modify and select 'Properties' from the context menu.

3
Adjust Appearance Settings

Click on the 'Appearance' tab within the Properties window. Here, you can select your desired font and adjust the font size from the drop-down menu.

Change Font Size in Interactive Form Fields
Auto Font Sizing: You can set the font size to 'Auto' in the Appearance tab to make the text automatically shrink to fit the box if a user types a large amount of information.

Easily Edit PDF Fonts and Convert Tables with WPS Office

WPS Office includes a powerful built-in PDF editor that allows you to easily modify font sizes, manage interactive forms, and seamlessly convert PDFs to editable Word or Excel files to fix complex table layout issues.

  1. 1. Open Your PDF: Launch WPS Office and open the PDF document you wish to edit.
  2. 2. Enter Edit Mode: Click on the 'Edit' tab located on the top toolbar and select the 'Edit Text' tool.
  3. 3. Adjust Formatting: Click on the text you want to modify, highlight it, and use the floating properties menu to change the font size.
  4. 4. Convert for Table Edits: If table lines need fixing, click 'PDF to Word' or 'PDF to Excel' on the toolbar to convert the file, modify the table borders, and save it back as a PDF.
Directly edit PDF text and adjust font sizes as easily as using a Word documentSeamlessly convert PDFs to editable Microsoft Office formats to fix table grid linesHighly compatible with Adobe PDF standardsLightweight, fast, and user-friendly interface
microsoft office alternative - wps office

Frequently Asked Questions

Why can't I edit the table grid lines directly in my PDF using Acrobat?

Table lines are typically converted into flat background graphics when a document is exported to PDF. Adobe Acrobat is not optimized for changing underlying layout graphics, so it is recommended to adjust the table borders in the original source program like Word or Excel.

Does changing the font size in the Appearance tab affect existing body text?

No. In form fields, changing the font size in the Appearance tab will only update the text typed into that specific interactive field. It does not affect the static background text of the overall PDF document.

How do I change the text size of the actual PDF body, not a form?

To edit standard body text in Adobe Acrobat X Pro, you need to use the 'Edit Document Text' tool. However, for extensive text changes or layout shifts, editing the original source file or using a dedicated PDF-to-Word converter is highly recommended.