There are a few ways to increase the capacity of AutoCorrect in Excel. One way is to simply increase the number of entries that it can hold. This can be done by increasing the value of the "Maximum Number of Entries" option in the AutoCorrect dialog box. Another way to increase the capacity of AutoCorrect is to add more memory to your computer. This will allow AutoCorrect to hold more information and make more corrections. Finally, you can also try using a different version of Excel. Some versions of Excel have more memory than others and can therefore handle more information.