The requirement is very simple. Just draw a red bordered circle in a specific position.
41 Answer
For a clean result (uniform thickness, smooth and clean edges):
- Use the Ellipse select tool to make a selection
Select>To pathSelect>None(otherwise step #4 will only create half of the line)Edit>Stroke pathin "Line" mode
Simplifications
- If you do several circles, you can do a selection with several circles in step 1 (shift click for additional circles), and execute steps 2-4 only once.
- For thin lines (3px or less); you can replace steps 2-4 by a
Edit>Stroke selection(but this is ugly on tick lines) - You can of course do both together (many thin circles)