Pasting the right image size

I have an application that creates stock charts. I want to use those stock charts on a website. But the application itself has no image features. I can copy the chart though and past it into photoshop. Now my problem is that I want every chart to have the same size (look). I was thinking of making the charts w x h = 400 x 600, in that way they fit nicely on my website. And I want to save it ready for the web so that I get small files.

My desktop has a setting of 1280x1024. My stock application has windows for the charts so I can basically make them any size as long as they fit on my screen. I copy the chart and then i go to photoshop but that is where I don't know exactly what to do to get uniform looking charts.

Does any body have any suggestions on how to get uniform looking pics. Should I create always the same canvas size, with the same pixels? Or how would I go around this?

If I understand the problem correctly there is the crop tool in your tool bar.
there you can choose which size you want to crop it to...
There is width and height.
Just remember to put the px after your number
400 px and 600 px.
Then it will make all the images look the same...
Sorry if this isn't what you were looking for...

*edit*
Oh and welcome to the forum. :D

well, if I understand you correctly, and not the way 3jorn did i think you should get what youre looking for by -

1. Go to you image menu - then go to image size.
2. Make sure "resample image" and "constrain proportions" is checked with a little "wing"

Then you can choose your width and height in both pixel, cm, etc. But bear in mind that if your image doesn't have the right proportions origianally you won't be able to hit 400 x 600 px. Then you have to do as 3jorn said and cut something of the image with the crop tool.

hope that helps.. Welcome to the forum

well, in your chart application, i'm assuming that you can either zoom in some way or simply are at the same zoom level every time? if so then when you just do a screen cap then in ps create a new image (ctrl-n) it'll give you an image the exact size of your capture. do that everytime and you'll have uniform charts at their default size, then just resize each the same to your 400x600 or whatever.

chris