As a newbie I was encourage to ask a question; I'm doing so.

I'm quoting from my professor's .tcshrc which scrolled by rapidly - I took a picture:

alias indent indent -kr -i8 -l999999

stty erase ^\?
setenv LESS "-EXR"
unsetenv MANPATH

There are other things but, these are my ???

"l999999" ???
"stty erase ^\?" ???

less is called using non-capitals? I find no capital letter options?

"unsetenv MANPATH" ??? manpath is also called with non-capitals?

There is only so much time in class - especially if things are remote.

Thank anyone (you), larry

The first two questions have nothing to do with tcsh per se. See the manual pages for indent(1) and stty(1)
less is not called here. setenv LESS sets the environment variable LESS which is used — surprise! — by less and described in its manual page.
Search harder then. They're described in the same man page.

unsetenv MANPATH unsets the environment variable MANPATH. That variable is described, you guess it, in the manual page of man(1).

setenv and unsetenv are tcsh builtin commands to set/unset environment variables. See Local variables vs. Environment variables in the grymoire.com's tutorial on csh. And the very next chapter of the same tutorial explains what stty erase is used for.

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I received an email asking if this was resolved. I thought I had thanked you. If I didn't I so so now.

Thank you, larry