Hi Gabriel and welcome:
To use your SX540HS as a webcam you need to go to the linked website and download this free software:
How to download and install EOS Webcam Utility for Windows. (canon.com)
If you need further clarification see:
Bing Videos
I hope this resolves your issue
cheers, TREVOR
The mark of good photographer is less what they hold in their hand, it's more what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
