I have extension with icon and screen shots.
Recommended size for extension icon is 450 px x 450 px and maximum dimension is 700 px x 680 px for screen shotsas per document 0448_Connect_DevStyleguide_v6.pdf
I want to make my icon and screen resize as per above sizes with high resolution.
How to resize images and keep in high resolution.
I am developer with little knowledge about photoshop.