How control different resolution in different machines like laptop, Desktop

C# :

            IWebElement html = driver.FindElement(By.TagName("html"));
            html.SendKeys((Keys.Control + Keys.Add));

Java:

In Java, We have chord method, this method will send sequence of keys together:

WebElement html = driver.findElement(By.tagName("html"));
html.sendKeys(Keys.chord(Keys.CONTROL, Keys.ADD));