How can I write a sentence everything in capital letters with my Mac?

Hi all,
In the Voice Over help, says that te key which is under tab key, is, as happens in Windows as well, the key to write everything in CApital letters. However, when I press it, the letters are not written in Capital Letters, so, how can I do to write all letters (in a sentence, for example) in capital letters?
Many thanks in advance, and goodnight:
María

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#1 selection

Hello Maria,

by default, the caps lock key is set to be a modifier for things like read from top. to accomplish what you want to do, press the key twice. VoiceOver will say, caps lock on. At that point, your sentence will all be in capital letters. press the key twice to revert to lower-case.
thanks,
Daniel

#2 Mny thanks

Goodmorning Daniel and all,
ok, I tasted and it works, perhpas not twice but I should press this key more times but, it works, so, problem resolved, many thanks again and nnice week.
María