The standard trim command (TR) will do it, but there is a better way.

First, for standard trim, exploding the hatch is usually necessary to trim any part of it.  type explode and select the hatch.  To trim, type "tr" and you can either select objects, or hit enter again and click on what you want to trim.  It will delete the segment you click on up to the first visible intersection point.

The easiest way is to use a buttom called Extended Trim.  This command was part of the VIP / Express tools set circa 2000-2001.  You may try searching for a possible download for it if you do not have it.
The extended trim command allows you to select a boundry line and trim everything off of one side of the boundry line.  This command is "teh sauce!" for large scale trim jobs.

I just looked up what version of the VIP express tools the Extended Trim command is on, and I have it on my Q1, 2000 disk.

just some added FYI.

also dont forget that you can use the "fence" selection option with the standard trim and many other commands, sometimes that gets overlooked ex:
start trim command -> select cutting edge, enter -> instead of selected individual objects hit f then just stretch your fence selection to where you need it to select multiple objects. Works good for going around objects too because it can have many vertices.

I also thought there was a "cookie cutter" trim option somewhere but was unable to find any info on it, loosing my memory I guess.

A suggestion on trimming hatches. If you want to keep your hatch associative it may be better in the long run to just rehatch the object(s) if it is cost effective time wise especially for smaller hatches. Exploding some hatches really makes a drawing hard to work in, in my experience. IF you do rehatch, it might be a good idea to just move the old hatch untill you make the new one so you can match properties on it, save having to hunt down the pattern. We went from 2000 to 2005 just recently and they added the ability to trim hatches with the trim command, pretty nice, I don't guess 2004 has that.

good luck

Norrin,  excellent explnation on the fence feature on the trim command!  That is a new one for me that will come in handy!

BTW, I am on 2004, and I tried to trim a hatch, and no dice, so you are correct on that 2004 cannot trim hatches.  

hi, These are not answers to my question I want to trim hatches at once without exploding, I want to trim  hates outside a rectangle with minimum clicking?

Yes, i have had those same issues with paning.  Basically you have to hatch, or select within the existing window without paning!  What a pain, but oh well, its not all that bad.

Best regard for you.

I checked extrim but it doesn't work probably it dosen't work sometimes when I select inside of rectangle when we want trim hatches.