I have a this field in Odoo

third_check_ids = fields.Many2many('account.third.check', 'third_check_voucher_rel',
'dest_voucher_id', 'third_check_id', 'Third Checks', readonly=True,
states={'draft': [('readonly', False)]})

My problem happens when I need to select the checks from "Add an item". The list view of thirs_check_ids has a lot of fields, and when I click on "Add an Item" it show a m2m selection just a like a wizard (Is not a wizard), but I can only see some of the fields. I'd like to see ALL fields in the view, so I need to resize the window. How can i do this?

<field name="third_check_ids" string="Third Checks" nolabel="1" colspan="4"
  domain="[('state', '=', 'wallet')]">