Change default font size when pasting from 18 to 11

Hello,

Thank you for posting your question on the Forum.

Please check this below step to get answer to your question:

Change options when pasting content

• When you copy content from a formatted source, such as a webpage or another Word document, you can select options at the time you paste it into your document.
• Select or tap where you want to paste the content.
• Press CTRL+V and then select the Paste Options Paste options button or press CTRL.
• Use the left and right arrow keys or hover over the paste options for more information.

The Paste options button lets you select formatting options and is on by default. If you don't see the button, it might be turned off. Follow these steps to turn it on.

• Go to File > Options > Advanced.
• In the Cut, copy, and paste section, select Show Paste Options button when content is pasted.
• Select OK.

Check this below link to know more about controlling when pasting the text. It has few options please heck carefully. Hopefully you will get your answer with the help of this.

• Control the formatting when you paste text

Feel free to ask questions here.

Have a nice day!

Best regards

Roop_green || Microsoft Community Support

Microsoft servers are automatically removing XML markup in messages. Here is a modified post with the correct information:

The default paste text size is set in the presentation.xml part of the file. Here's how to set it:

1. In PowerPoint, save the presentation as PowerPoint XML Presentation (*.xml) format.
2. Open the XML file in NotePad.
3. Search for p:defaultTextStyle.
4. Shortly after that is the xml to set the default text size. Edit the number in bold red. Before:

a:defRPr sz="1800"

After:

a:defRPr sz="1200"

Then reopen the file with PowerPoint using File>Open. Resave as standard PPTX format. Test pasting some text.