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In HTML, the <select> tag creates a drop-down list of options for the user to choose from. Sometimes, you may want to hide certain options from the user for various reasons. This can be achieved using CSS by applying the display: none property to the <option> tag that you want to hide.

There are limits to the number of items that will show in a data validation drop down list: The list can show up to show 32,767 items from a list on the worksheet. If you type the items into the data validation dialog box (a delimited list), the limit is 256 characters, including the separators.

It is not possible to limit the number of visible elements in the select dropdown (if you use it as dropdown box and not as list). But you could use javascript/jQuery to replace this selectbox with something else, which just looks like a dropdown box. Then you can handle the height of dropdown as you want.

The size attribute specifies the number of visible options in a drop-down list. If the value of the size attribute is greater than 1, but lower than the total number of options in the list, the browser will add a scroll bar to indicate that there are more options to view.

How to Build a Responsive Navigation Bar with a Dropdown Menu using JavaScript Final result of navigation bar. dynamically getting each dropdown element using the button dataset property. toggling the dropdown menu. toggling the aria-expanded property. Final result after adding the third dropdown (Jobs)

For sub-menu to not push the content down it needs to have position: absolute style. Other bits of css is to fix the styling and sub-menu width. Make your dropdown menu's position: absolute; and then the element under it as position: relative; .

CSS select { width: 200px; height: 50px; line-height: 50px; -webkit-appearance: menulist-button; -moz-appearance:none; }