Could I thicken lines in lo draw and how?

I need to make lines on a drawing slightly thicker. I have never used LO draw. Can I do this or could someone point me to the instructions for how it is done. I would imagine artists understand. It seems the self-publishing programme may not be able to see the finer lines.

Of course you can make lines thicker. In the sidebar (Ctrl+F5). The object (the line) must be marked, then you can determine in the sidebar under properties the line strength.