I'm trying to find in Paint.NET the functions I use often:
1) How to straighten photos, using an horizontal line or a geometrical figure (I tried yet the radius straighten, but the photos are deformed then)
2) Some info on how to add a transparency layer and how to "colour" an area with transparent background;
3) How to make a gradient of two or more colours with advanced settings;
4) How to cut an area of a photo with precision (point-to point system and point to point "guided" based on colour tollerance levels; magic wand seems not to cut and then I haven't a firm hand);
5) Advices to additional plugins for photo editing (borders, frames, artistic effects, ecc ecc).
Thanks in advance ^^