How to move theme options from parent to child theme

Some users don’t start their websites with child theme, and decide to install it later.
In such case, the child theme activation will revert their theme options to default state.
To migrate theme options from parent theme to child theme You need to:
1) Go to Theme Options -> Export/Import Options, and copy the code (save it somewhere)
2) Install, and activate the child theme.
3) Go back to Export/Import Options, paste the code you’ve copied earlier, and save.