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I have my WordPress Media settings set like so. Based on these settings no generated large image should exceed the width of 540px.

I embed an image in a post like so. I choose "Large" as a image size, which should have a restricted width of 540px.

The end result is an image of 1024x769px. Why won't the image adhere to my Media settings?

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Your thumbnail is being created at rustyrambles.com/wp-content/uploads/2012/02/… but I'm guessing you're saying you wish to use the large sized image, but it's not being genereated (i.e. rustyrambles.com/wp-content/uploads/2012/02/… doesn't exist). Did you make the media settings change after uploading the image, or before? – Simon Forster Sep 6 '12 at 10:13
Yes I'd like the "Large" size thumbnail, which I set to 540px max width. I made these settings changes before embedding the image, although not before uploading it. Surely this thumbnails generation step happens upon embed (at whatever size)? – AlecRust Sep 6 '12 at 10:45
Image sizes are generated on upload I believe. See answer below. – Simon Forster Sep 6 '12 at 10:56
No, images are definitely generated and resized on upload, not on embed. Re-upload the image, or use a "regenerate thumbnails" plugin to resize existing images. – Otto Sep 6 '12 at 12:40
up vote 2 down vote accepted

Try uploading the image again now you've set up the media settings, this should fix it.

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