Uploading one or many files is pretty straight forward and easy to do:
- Create a new Article
- Click on the “Add Media” Button
- Drag several Files, up to 20 is recommended, into the uploading window
- Wait until the Upload is completed
- Insert the Files into the WordPress-Post
Is it possible to alter these Images in size later? Yes you can resize them, but it does not re-calculate the image again. This means that the image might look fuzzy and not smooth at all. Therefor, reinserting or even reuploading is suggested.