You don’t need steady hands: in iPhone Photos Markup, hold after drawing and your circle/arrow/line snaps into a clean shape.
- Open Photos → pick an image → tap Edit.
- Tap Markup (pen icon).
- Draw a shape (circle, arrow, straight line, rectangle).
- Hold for a moment at the end instead of lifting immediately.
- iOS smooths it and offers a perfect shape — tap to accept.
- Save and reuse the image for clear instructions.
Why this helps
Your screenshots look instantly cleaner, which saves time and reduces back-and-forth when you explain something.