When using ellipses and em-dashes, here are a few tips:
Ellipses run into the next word, whether they are in the same sentence or not, unless you're using dialog.
For example:
The cat was sneaky...and persistent when it came to getting the people's dinner.
The cat ate everything he could...He even devoured salad.
The cat talked in a mumble... "Rawl, raaawl..."
Em-dashes are made by typing a letter, then adding two dashes. - and -
Then you simply add another letter.
Something I see a lot with em-dashes is a backward quote. You can fix this by typing the em-dash, then a letter, then the end quote and deleting the letter.
