Unable to Select Multiple Worksheets

I am using Microsoft 365 and need to select three worksheets to copy and save as a .pdf file.

- deselecting / over-riding the browser settings does not work.
- have tried using Chrome as well as MS Edge browser.
- have tried on Mac as well as PC

What is the keystroke to select all worksheets?

Thank you,
ceem1960

If you are using the online version, then I think you are out of luck as I don't think it's possible.

Thanks for the response.
Same thing happens from using the desktop version.
Any suggestions for that?

Try Print instead.

For the desktop version use either Shift & left click or Ctrl & left click depending on which sheets you want.