I guess the reason Amanda needs to set the axis is to be able to generate multiple plots and then combine them together (in Illustrator, or similar).
We had the same request from our users (regarding the XY-plots).
Here is a modified version of the XY-plot tool that allows the users to manually set the axis. With it, they can generate multiple plots with the same scale. Similar modifications can be used for the histogram tool.
-------- Original Message --------
Subject: [galaxy-bugs] Histogram Data
Date: Tue, 8 Jun 2010 17:10:23 -0500
From: Amanda Supak <[hidden email]>
To: [hidden email]
Hello Galaxy Staff!
I had a quick suggestion for you! Would it be possible to make a tab-delimited output file you could download when making histograms? I noticed that you can only get the picture of a graph, which is obviously generated by your servers somehow. The only problem is when I make different histograms with different data the axises are not the same for each, and there is no way for me to change that fact. If you made an output file then I could create the graphs myself and fix it to my liking.