Generally speaking, we recommend uploading images that are the size of the container they’re filling, or at most 2x that dimension for Retina resolution. Keep in mind that the size of the images that you’re uploading will also affect the speed at which your site displays.
Individual images will display at the size they were uploaded at. They can be up to 50MB.
The minimum dimensions for cover images on Adobe Portfolio are:
We recommend uploading cover images that are below 1MB.
Images imported from Lightroom
Lightroom CC uploads a maximum of 2560px, so the desktop-based workflows are capped at 2560 today.
If you’d prefer to have more control over the quality and size of your images uploaded, download your files from Lightroom, resize them, and upload them directly to your Portfolio site.