Hello,

You have to create a tree_view for your model.

default one is like this:

<?xml version="1.0"?>
<tree string="My view">
    <field name="name"/>
</tree>

just update the default one by adding fields you need:

<?xml version="1.0"?>
<tree string="My view">
    <field name="name"/>
        <field name="my_first_field"/>
        <field name="one_other"/>
</tree>

To do this, enter developper mode got to your list view, and click on upper left selection box and choose "Edit TreeView"

You will see this popup:

enter name, model and change list of fields you want to have.