From Kb_JMY(晉明夷)

• Inkscape: Clipping & Masking
• Inkscape: Colour Management
• Inkscape: Text

faq(Inkscape)

How to draw a horizontal line?

• Ref: inkscapeforum.com -- Stupid Question: How to draw a horizontal line?

• Q: How to draw a horizontal line?
• A: Use the "Pencil Tool" or "Pen Tool"

-> Click and release for one end point,

-> hold down the Ctrl key and click for the other end;

Remarks: the Ctrl key restricts the line to set angles (every 15 degrees?), one of which is horizontal.

(There's also a new option on the pen to draw only orthogonal shapes. Or you can use grids, or guides)