1) I want to make a table or a list group but it must be proportionnal.
For example, on this screenshot : hidden link
You'll see that because of the value of a taxonomy, it make different size and the table is not proportionnal.
2) I want to add a column in which I'll put the title of each taxonomy. Where should I do it ? In the view ? In the Layout ?
3) How can I delete the space between each product column ?
1. The table won't exactly be proportional unless all the data is the exact same length and size.
2. What exactly is generating this ? If it is being generated by a layout then you add the titles to the layout, if the table is being generated by a view then you will add it to the view.
3. Could you send me a link to this so that I can have a look ? It might be that we just need to adjust the margins.
1) I think I'll make sure that if taxonomy is empty, I'll write the title within the case.
Regarding the size, I tested with the height property and it's working enough for me.
2) hidden link on this screenshot this is what I want, to avoid writing the title inside each row, but to put on a additional column. I guess I can do it both within the view or within the layout, but I want your point of view on it (within the view is better maybe ?)
From your screenshot I see you want to have vertical headers.
Take a look at this example below. hidden link
I'm not sure how your table is built originally, however I suspect that its generating the data using views? If you can send me a screenshot on the backend that would help.
Looking at the link you sent me it seems you're able to remove the white space already.