How to lock the font size and prevent the text from auto-resizing?

Changing the size of your text box will auto-resize your text to match the size of the text box. 

To prevent this, we can lock the text size by clicking the lock 🔒 icon beside the font size on the top panel.

Clicking on the lock 🔒 icon again will unlock the font size, allowing your text to auto-resize with the text box.