How to draw a line ?

[sonichy]

I can not find a line and arrow.

[hi5]

You can't draw arrows directly but you can draw lines using the pencil and brush tool (shortcut P for pencil, B for brush). If you click and hold shift with the Pencil tool you can draw straight lines between points.

Related: there are a few "arrow" or draw "shapes" requests which may come to PD at some point #597

[sonichy]

Hold shift is not good to use, I hope split pencil and line.

[ericchase]

shift with pencil doesn't draw 90 degree lines. hope this helps

(obviously we can create a line with 3 extra pointer actions by clicking rectangular selection, selecting a rectangle in the shape of a line, clicking paint bucket, clicking inside the selected rectangle, and then clicking back to pencil. but considering the pencil can draw non 90 degree lines with ease, it's rather strange that it drops support for 90 degree lines)