How can I add required columns in odoo Many2many form view?

Question

I am having a Many2many field on a form view, field is supposed to show 5 columns but it shows only 3 in my case. All 5 fields are available there on other model. but still not able to get the solution. Help appreciated. I am using Odoo v-10.

Here it shows 3 columns, and I want 5.

Answer 1

Edit its form view and where you defined the field add its view there

<field name="my_many2many_field">
    <tree>
        <field name="first_field"/>
        <field name="second_field"/>
        <field name="third_field"/>
        <field name="fourth_field"/>
        <field name="fifth_field"/>
    </tree>
</field>