3 Issues on the engineering drawing

[FrankLeung]

I tried TRIM command it doesn't work. In the first step I wrote ''trim'' in command line, then I clicked all 6 lines (which six lines is showed here: http://img.photobucket.com/albums/v309/Andreii/sixx.jpg) and clicked Enter but nothing was removed.

Since TRIM is for cutting, I probably need to move the four circles somehow else, move function (right mouse click / move) won't work.

 

Trim..

that is a function for you to cut line with from some 'reference line'..

 

Trim>>click the reference line>> Enter >> click the part you want to delete

[ATmu3]

Yes I know what the function does because I checked here

It is explained but my autocad doesn't delete the lines. After clicking the part I want to delete and ''Enter'', it doesn't delete anything.

[ATmu3]

I know trim function is installed with the main installation of autocad. Perhaps my function doesn't work but it is installed correctly im sure, i don't receive any error when i type it in command line and I can also access it through Modify menu / Trim. I doubt that I would have to reinstall the program.