width and height window and datatable

Good morning, I have the following problem.
I develop my pages on a notebook doing pages in full screen, but when I reproduce the site on a bigger monitor is all smallest course. How can I solve this problem?
Thank you

Hello,

Are you using fullscreen mode and relative sizing? Can you please provide a snippet to test your implementation?

{
  id: "datatable_preventivo_prodotti",
  css:"my_style",
  view:"datatable",
  autoConfig:true,
  footer:true,
  editable:true,
  resizeColumn: true,
  resizeRow: true,
  columns:[
    { id:"IdProdotto", header:"Id Prodotto", fillspace:true,hidden:true},
    { id:"cCodiceProdotto", fillspace:true, header:"Codice",footer:{text:"Totale:", colspan:3} },
    { id:"cNomeProdotto", fillspace:true, header:"Prodotto" },
    
    { margin:5, cols:[
      {},
      { view:"button", value:"Salva" , type:"form",width:120, align:"right",click:Save_Preventivo_Cliente},
      { view:"button", value:"Annulla", width:120, align:"right", click:"$$('window_preventivo').hide()"}
      
    ]}
  ]}

the problem is that toolbar does not follow the downsizing