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I have a view questions about how to make changes in the product view:
Where can I find instruccions how to make a personalized layout?

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1.)
How do substitute the "name of the characteristics" for a text which is allwas the same in all products like "choose size". When I change the php-file, how to prevent deleting in case of an update of hikashop?

Example:
Instead of:
"Size 50g/100/250"

Should be:
"Choose size"

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2.)
If I'd like to change the alignment of the following fields from vertical to horizontal I have to change (deleting <br>) a php-file, wright?

Is:
1.hikashop_product_characteristics
2.hikashop_product_price_main,
3.hikashop_product_quantity_main

Should be:
1.hikashop_product_characteristics 2.hikashop_product_price_main, 3.hikashop_product_quantity_main

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Thank you!