Odoo change width popup

Question

Anybody knows how or where to change the width of a popup form in Odoo. This may apply to all models.

I already found a module to edit the width of a standard form view. But I also want to change the width of a popup form view.

Answer 1

The concerning css class is .modal-lg

Include a style sheet

<template id="assets_backend" name="custom_css" inherit_id="web.assets_backend">
    <xpath expr="." position="inside">
         <link rel="stylesheet" href="/your_module_name/static/src/css/your_css_file"/>
    </xpath>
</template>

with this code

.modal-lg { width: 80% }