Drawing by pixel without smearing or blurring

Question

I am going crazy trying to figure out this very simple thing.

I want a drawing tool (like pen or pencil or paintbrush) that can just paint pixels directly as pixels. Thus if the size of the tip is 1px, and I click once, I get a 1px square. If I click and drag 5px, I get a 1px x 5px line. No smearing, no vectors, no curve fitting or stylizing or texturizing or anything like that. How do I do it?

Answer 1

Use the Pencil tool in Photoshop;