I can not find Properties from the Modify menu

I installed librecad 2.1.3 but in the Modify menu I do not find Properties to change the thickness of the lines already plotted. What is the problem?

You have to click on the entity after activating "properties". Is it that or has the "properties" command been lost in the "modify" menu?

In the Modify menu' there isn't Properties

Is it really not there? Maybe you have thrown it out by playing with the menu creator. Easiest way to fix that is a reinstall. This is how it looks like out of the box:

From the posted image I can find the Properties but I can not change the thickness of the drawn lines. I tried uninstalling and reinstalling Librecad but in the Modify menu there are no Properties.
Please look at these two pictures?
Thank you.

Its part of the Tools menu then Modify.

Ah, I see. The italian (?) translation of "edit" was misleading. And I have mixed up menu and toolbar. Sorry. But now you probably have found it, thanks to mad-hattter.