Multiple size variations created by image_picker?

[ludi]

When uploading an image in the customizer uusing image picker, is it correct that Shopify automatically creates multiple images with width variations for responsive use?

Using the Dawn theme, I added an image to a image-with-text section - 'catupleftwide.png'

The source code output on my site contains image references like:

catupleftwide2_ffb71cbc-b878-44e9-bbd9-41a691f88060_165x.png

catupleftwide2_ffb71cbc-b878-44e9-bbd9-41a691f88060_360x.png

How many width variations are automatically created? Is there any way to control/modify the specific sizes?

[Developer-G]

Hello @ludi ,

They are not automatically created actually theme coder call theme a/to their need. 
You can check here how you can change size.

Thanks

[ludi]

Thanks for that.

Is there a recommended upload size (dimensions) for original image? I'm using the Dawn theme.