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What are TeX tips?
TeX tips are an easy way to find and experiment with small TeX examples. TeX tips have a blue border around them. It's easy to write your own TeX tips.
How to use TeX tips
Related TeX tips are put together in a group. Each group has an input area and an output area. There's an example below.
When your cursor is over a tip, it changes. So try clicking on a TeX tip. This writes the TeX source to the input window, and updates the output window. Notice that output has a green border.
You can change the text in the input window. To run TeX on your input press either the [Return] key or the [Try it!] button.
Tips related to sums.
How to write TeX tips
The easiest way to write TeX tips is to use the 'My Tips' template.