Good day to all'I want to ask if how can I able to edit the lines or any objects because the properties panel I think has error, it does not appear when I right click and choose properties it is blank, are there any way I can open the properties box. Please help. thanks.-ed-

Possible fix:Set "pickfirst" to "1".

thank you for your reply but it didn't work, I think it has a corrupted file for the 'properties' panel.

If that is what you think then I would suggest you try a REPAIR of your installation.  A REPAIR is not the same as an uninstall/reinstall.

I will repair the program, thank you for your reply.