In the mode of a page list 
Auteur : Roman K.
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in the mode of a page list of products subject to the option. (display) - just a picture, up to 60% as the change to 100%.
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Hello Roman,
If you choose just picture it will use automatically the maximum width (100%) also if it continues to show 60% but it's deactivated and it will be of 100% of the space available.
If you require any further information, please feel free to write back.