You're bound to be familiar with making the same typos over and over again when writing. For example, you want to write "you", but the text ends up as "yuo", which was not your intention.. In such cases, Presentations intervenes via Auto correction and corrects such common typos automatically.
The ribbon command Slide show | group Review | Auto correction 
opens a dialog box in which you can specify the settings for automatic correction.
Apart from the ability to avoid these accidental typos as in the example above, there are other useful auto correction functions in the dialog box:
▪Capitalize first letter of sentences
▪Correct capitalization of first TWo LEtters
▪Special replacements: For example, automatically create a smiley from the combination :-)
▪Automatically convert quotation marks to the typographically correct characters when typing
▪Format URLs as hyperlinks
▪Add superscript to ordinal numbers
Tip 1: Automatic correction is triggered as soon as a term is terminated with the space bar, the Enter key ↵ or with a punctuation mark.
Tip 2: If you want to undo an unwanted auto correction in your document, use the Undo command 
or press the key combination Ctrl+Z immediately after the auto correction.
The following pages contain detailed explanations about all auto correction functions.