Okay, so yeah, when using Preview, if I have a 6MB TIFF file, and I simply apply a rotation to it and re-save...voila, it's now 12MB! Anyone know what's up with that? And this is Preview 5.0.3 on OS 10.6.8.
Mac Pro, Mac OS X (10.6.8)
Use the "Export As" command. Otherwise it will save the "Original" and the new "Version" (the rotated one).
Use the "Export As" command. Otherwise it will save the "Original" and the new "Version" (the rotated one).
I don't see an 'Export As' command. Only SAVE ALL, SAVE AS, and REVERT TO SAVED.
Indeed though, it WAS saving the original as well, so I'm just going to do this in Photoshop now...and was able to remove the originals from the ones I already done in Preview by re-saving without layers in Photoshop.
Sorry for the confusion. I made the assumption using the Mountain Lion version of Preview.
For the Snow Leopard version, use "Save As" then select Compression: PackBits, and uncheck Alpha.
You should then see that File Size will return to the before rotation version.
Or, like you've discovered, use another Photo editior that can strip away the added information.
Why does rotating an image cause it's size to double?
