How to highlight line ends ?

Hi,

I'm pretty fresh at Draft sight and I couldn't find an answer for my question. However I couln't even find it out how to do it in AutoCAD.

Question is how can I highlight lines ends ? I want to find out which lines are free ends, which are connected to next line in pint and which cross Another line. I need it to check dxf files before I send it for lasercut.

Thanks and Have a nice afternoon.

Grzegorz Janisz