Checking for Resolution - was: Testing, testing, 1-2-3

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This is an edit to the original post below: I found that if a photo does not go through, you can try restarting your browser and try again. I save my post to my email so I won't lose it. I hear the resolution should be about 72. To check for resolution, right-click on the photo, then properties, then details and look for resolution. Just testing to see if this will go through. Can someone tell me what size photos need to be when they are attached? I have been trying to post something with a photo for at least 3 hours and it will not go through. I resized it twice. It is currently 225 x 300 pixels. Thank you!!