Login Woby portal via https://portal.woby.nl/login and click View.
Go to Articles and click on Edit at the article where you want to add a photo.
Click browse to upload your own image from your device or select Media Library to choose an image from Woby's database.
Below are a number of useful websites for editing images.
Adjust resolution
Use images of 800px by 600px (WxH). With a 3:2 ratio and a file size under 800 kB, you will maintain the most optimal experience.
When the right resolution is set we recommend to reduce the file size with the website TinyPNG: https://tinypng.com/
Change file type.
Allowed file types: jpg, jpeg and png.
Remove background.
Try using images with a white background or remove a colored background from this website.