4 Best Ways to Change Font Size in PDF Form on Mac

PDF is now a common format for office similar to MS office, offering a smooth way to read, edit, send, receive and collaborate on a document. But it's packed with poor editability, which makes it difficult to change font size, color or weight in a PDF file that contains blank form fields. Here we will discuss how to change font size in PDF form on Mac, both free and paid solution included.

Change Font Size in PDF Form on Mac Using Following Tools:

How to Easily Change Font Size in PDF Form on Mac?

It is easy to fill in a PDF form just using a free PDF viewer tool, but if you want to change font size in the fillable field, it becomes impossible without using a PDF editor. Hence we recommend you PDFMaster, the most user-friendly PDF editing program to change font size in PDF forms, also change font size for non-interactive texts.

PDFMaster is nevertheless a no-nonsense and efficient PDF editor that allows users process a PDF file for different purposes. It can annotate a PDF, create and convert PDF, edit texts/images/watermarks/background/header/footer, create PDF form and fill in the form, also protect, OCR, merge, compress and compare PDF files.

The Form tool in PDFMaster helps users easily change general properties and appearance of a form field, such as field name, visibility, multi-line, font color, font size, style, alignment and so on. Also you can use the Edit tool to change the properties for common texts in the file.

• Step 1. Install the software.
  Download, install and run PDFMaster on your Mac.
  Free Download
• Step 2. Open the PDF form.
  Drag-n-drop to PDF forms into the program, or hit the “Open file” button to import PDF form. 
• Step 3. Open Form Field Properties Panel.
  Go to Form, click on the form field you want to change font size for, then show up the Annotation properties panel.
• Step 4. Change Font Size in Form Fields.
  Go to Appearance > Font size, choose a size from the list.
• Step 5. Fill the Form with Font Size Changes.
  Go to Fill, you will be able to fill the form with selected font size.
• Step 6. Change Font Size for Texts outside from the Field.
  To change font size for common texts, you can go to Edit, select the texts you want to change the font size, and choose font size from the right-sided panel.
• Step 7. Save the File.
  Once the file is ready, hit the Save button.

How to Change Font Size in PDF Form with Mac Preview?

Preview, pre-installed on Mac, lets you view PDF files as well as images. It also gives you a toolbar to edit PDF, but the feature to edit and mark up often be overlooked. The Preview app is fast and free, though not able to change form filling font size directly, it does the job as follows.

1. Open the PDF form in Preview.
2. Show the Markup toolbar.
3. Click on “A” to add a text box and move onto the form field that you want to change font size for.
4. Add the texts, then click on “Aa” to change font size, color or alignment.
5. Hit Save from File menu.

How to Change Font Size in PDF Form Online?

Also, we have online tools to change font size in a PDF form. Here in this part, we will introduce 2 online tools: Google Docs (free) and SodaPDF (paid). The greatest benefit of using online tools is that you don’t have to install any 3rd party program onto your Mac, but you will have to upload the forms to a 3rd party server that delete the files after several hours.

#1. Google Docs (Free)

Google Docs is an online service from Google to edit PDF in Word document. It is the best alternative to Microsoft Office 365, helping users open a PDF and edit the document with a lot of tools. But it changes document formatting when opening a PDF, users have to manually fix the format errors one by one, which may take a long time.

1. Visit https://drive.google.com/ and upload your PDF form to the drive.
2. Open the PDF form with Google Docs.
3. Add the texts if necessary and select the texts you want to change font size, then choose a size. 
4. Once the file is ready, go to File > Download > PDF.

#2. Sodapdf (Paid)

Online Soda PDF is a one-stop PDF solution that has the power to create, convert, edit, insert, review, etc. PDF. You can remove the text fields first, then add text box and customize the font size, type, and style in your PDF form or apply other modifications. However, every time I make a change of the PDF form even the minor change, I have to wait for a while. Since PDF file will be locked when online Soda editor processes it. It’s just time-consuming and annoying.

1. Go to https://tools.sodapdf.com/
2. Upload the PDF form to SodaPDF, and wait for the document to load.
3. Select the form fields that you want to change font size for, then click the Trash icon to delete.
4. Click on Text icon and add a new text box to the place where you want to add texts.
5. Then select a font size from the list.
6. Once ready, click Export file > Download to save the file to your Mac.

Change Font Size in PDF Fillable Form on Mac Using Adobe Acrobat Reader

Adobe Acrobat Reader DC lets you view, comment, fill and sign PDF for free. For more advanced features, like edit, create, combine, etc. PDF, you will need to shell out money, but many Mac users are discouraged by the expensive price of Acrobat Pro. Although the free version is incapable of editing PDF, it will allow you to change font size in PDF form with Comment tool.

1. Launch Adobe Acrobat Reader DC on Mac and open PDF fillable form.
2. Select Text Box from the toolbar and add a text box to the place where you want to insert new texts.
3. Type the texts first, then select the texts and choose font size for them from the properties toolbar.
4. Once finished, click on Save button. Choose a folder and save your changed PDF form on Mac.

Conclusion

You can give a try on any of the free PDF font editors to fulfill your task, like change the font size, color, style, etc. Preview seems to be the best free solution for changing font size in the form, because it is pre-installed in macOS and every Mac users can edit the form later on their device. But if you intend to edit all the texts in a PDF form, or looking for a powerful PDF tool to handle your files, you’d better use the dedicated PDF editor PDFMaster, it is rich-featured, but affordable.