I'm trying to install Lyx on a new machine. Previously, I used Lyx with MikTex but now I'm trying to install
TexLive and then Lyx on the new machine. I downloaded and installed TexLive from
 First, when I click on the start button (Windows 10) I don't see Tex Live as one of the programs,
does that mean it's not installed? Under the C:/ directory I have the texlive directory which has
two subdirectories: 2019 and texmf-local.
 When I try to update the packages using (at the command prompt): tlmgr update --all
I get the following message:
'tlmgr' is not recognized as an internal or external command,
operable program or batch file.
I'd appreciate any help.