Why does Maple not have texture fill for plotting. Even the old Pascal had it.

Maple Help points out

All Programs>Maple 2017>Classic Worksheet Maple 2017

link that I do not have. Is there a reason for this and how do I fix this?

Why is constants not an envvar or differently, why is there no envvar to declare constants?

Is anyone accessing the https://www.mapleprimes.com/questions redirected to this page https://www.mapleprimes.com/errors/500.aspx?aspxerrorpath=/questions/default.aspx ?

https://www.mapleprimes.com/errors/500.aspx?aspxerrorpath=/questions/default.aspx

Is Maple capable of printing functional html links? That is can a Maple code output an html link that actually works?