Portfolio
You can import images, or create a new one with the picture operation New (the Picture Operations button can be found in the Picture Controls panel).
Every time you create or import a new picture, it's placed inside Rainbow Painter's portfolio.
Basically, that means that your work is already loaded when you start Rainbow Painter and it's also automatically saved when you quit!
You can navigate the portfolio using the controls found in the Portfolio panel.
If applicable, there's a button with the text 'Last' that lets you jump to the last picture you viewed or worked on.
You can also set a bookmark by clicking on the 'B =' button. When you later click on the '-> B' button, you will be taken to the bookmarked picture.
You should only keep your most current work in the portfolio, and you should also regularly export the pictures (in Rainbow Painter's own file format!) for safe keeping.
When you have completely finished a picture, we recommend that you export it (again, in Rainbow Painter's own format) and then remove it from the portfolio with the picture operation Destroy.