position fields (not core) in frontend form

Hello,
First, excuse me for my english.
My question is : how am I change position fields (new fields) in form in the frontend ?

Hello

Fields have a different order in every Item type that they belong
e.g.
different order in "Article" Type
different order in "Car" Type
different order in "Hotel"Type

you go to FLEXIcontent backend "Fields" manager
and you filter by "Item Type"

- then you re-order the custom fields

Thanks, it's OK.
But if i want place fields side by side ?

hello you need to use form html field to insert html inside your form
1 for <div class="span6">
2 for </div>
redo other 2 fields
=> all field between first span6 and seconf will be in same line

Thanks for your help.
After many test, I didn't arrive.
I did 2 fields and between placed my fields in order to they are side by side.
The result : my fields are above.
There is a mistake.
Please see the pictures

hello
did order your field between field ? why did you use span2 ? bootstrap use span12 for full ligne and span6 for halfe column