Yes, Toolbar Options is checked ON under widgets.
The online manual alleges there is a librecad.alias file on my computer but there apparently is not.
Online search found none.
Can you post a link to the one you found?
In the Tools dropdown, under Modify you will find Offset. I always use the command line "o" command.
The best advice that I would give anyone is to save your drawings! I save mine in three different places.
Then just play with LibreCAD! The more you mess it up, the more you learn on how to fix it. It's not the end of the world if you have drawings saved, and
you just give up and reload LibreCAD! Hopefully, what not to do is remembered.
The tool option bar content is dynamic. It depends on the active tool and when no tool is activated, the tool option bar is empty.
So best is to activate a tool, e.g. Angle Line and then toggle the tool option bar. Then you can easy locate it and move it to your needs. Usually it appears above the drawing area.
The tool option bar for Angle Line contains Angle, Length and Snap Point fields.
investing less than half an hour into Search function can save hours or days of waiting for a solution