How to easily resize pics for this forum

Once you have added all of the photos (and you can click the Add buttons again to add more), then on the left side click #2. Size

Now you have a few options to set the output size for resizing.. The simplest is to choose the first option (default) and type in the maximum number of pixels you want for the longest side of the picture. Type in your desired maximum resolution (in this case 1024). This option will make your landscape photos 1024 pixels wide, and your portait mode pictures 1024 pixels high.