Click on the images to enlarge them!

Step 1: Write a longer document in standard-font: Times New Roman 12

Step 2: Change the font to another font (here: DejaVu Sans)
Step 3: Change the font and size for one word. (here: DejaVu Serif 20)
Step 4 and Step 5: Use the "Copy Format"-icon to copy the word-format to anothere words: The remaining document font will be set to the standard font.