When using the TRIM command, which do you select first? 1-The cutting edges 2-The object to be trimmed 3-Everything 4-Nothing

it to be a

1-the cutting edges

The best is to select the cutting edges and then select the object to be trimmed. You can also done trim by pressing enter button 2 times.But this time all the objects will be selected and this is comparitively difficult than first one.

Thanks for the invitation

the answer 

the select 

1 

the cutting edges

If you press double space bar/enter after a trim command, you should always select the object to be trimmed but it always gonna trim to the nearest edge(assuming the edge and the object is both on same elevation) but if you command trim with a single space bar/enter it will prompt you to select the cutting edge first and another enter to select the object to be trimmed.

there is tow ways to do that:

1-you enter the trim command (TR) then enter, you select the cutting edges then you select the object to be trimmed.

2-you enter the trim command (TR) then 2 times enter then you select the object to be trimmed.

You should select the cutting edges first, then the object to be trimmed.

when i started my career i sued select the cutting edge first and now after the long career span now these days i randomly select all and trim where i wanted its says " the experts cut" hihihi ... thanks for the queston 

when using the TRIM command you have to select the cutting edges first

YOU SHOULD SELECT CUTTING EDGE FIRST