Ah a vexelor!

Not sure I can help you with this. Somehow, I can't find my PSP 7 version of Paint Shop Pro. I have 4.1 version and it skips till 8, then 9.

So, I can't tell you what the options might be.

Just out of curiosity are you doing photorealistic art or you more into the micro-game development art?

Hopefully, someone reading this with PSP 7 will jump in and perhaps know the answer to your question.

note:(for those that don't know, a vexel is a name which is made from a cross of Vector and Pixel. Pixel Art uses exact 2:1 ratios of pixels to make 3D-like art and very defined art. (i.e. photorealistic.)