Lock Text Box Format

[Ofnuts]

There are two ways to change the font in a text layer:

• In the Tool options dialog: this is the default font for all the text in the layer
  
• Using the on-canvas widget this is meant to change the font for specific parts of the text, by overriding the default font for the span of selected characters.
  

If you set the font for the whole text using the widget, then select everything and paste new text, the old text is deleted (together with its formatting) and the new text is added with the default font, since there is no overriding formatting. 

To avoid this, two options:

• Set the font in the Tool options dialog instead of the widget. An additional benefit is that you can save this as a Tool preset (together with size, color, justification...)
  
• Instead of bluntly replacing the whole text, insert your new text (which will then inherit the overriding formatting) and erase the old text around it.