Before anything, I need to mention that I'm visually impaired and severely dyslexic plus a lot of other fun stuff. So I may be missing something obvious. Sorry if my question seems silly.

If I can't get Inkscape to work for some reason, I usually devise a work-around involving brute-force. But this time I'm at a loss. I made what looks like some lines of different thickness but is really rectangles. But the "lines" are of different lengths.

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In other programs I was able to easily crop the lines at both ends with a rectangle selection tool, and delete what I selected so all the lines end up the same length. But that doesn't work here. I Googled the problem and was told to choose "Clip"... and then "Set" from the Object menu but when I did, nothing happened. Can anybody help me with this.

I'm sorry but there's one more disability I have to bring up.

If you have a solution, your answer has to be very literal if at all possible. I'm an Aspergers person and I have a hard time getting implied meanings or handling many things most people consider to be very simple. An answer should look something like the following. (if possible):

1. Do this...
2. Then do this...
3. Do this...
.......etc. ...

Any help will be very much appreciated.

Aspergers is mild autism. I'm an artist, musician, singer-songwriter but I have problems with many ordinary everyday tasks.

For anyone browsing through, this was answered here:
http://www.inkscapeforum.com/viewtopic.php?f=5&t=17167