[javascript] how to change the default positioning of modal in bootstrap?

<div class="modal">
  <div class="modal-dialog">
    <div class="modal-content">

      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
        <h4 class="modal-title">Modal title</h4>
      </div>

      <div class="modal-body">
        <p>One fine body…</p>
      </div>

      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>

    </div>
  </div>
</div>

how can I change the default modal position in bootstrap, where should I edit to change the default position.

To change the Modal position in the viewport you can target the Modal div id, in this example this id is myModal3

    <div id="modal3" class="modal">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
        <h4 class="modal-title">Modal title</h4>
      </div>
      <div class="modal-body">
        <p>One fine body…</p>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>


#myModal3 {
top:5%;
right:50%;
outline: none;
overflow:hidden;
}

I get a better result setting this class:

.modal-dialog {
  position: absolute;
  top: 50px;
  right: 100px;
  bottom: 0;
  left: 0;
  z-index: 10040;
  overflow: auto;
  overflow-y: auto;
}

With bootstrap 3.3.7.

(all credits to msnfreaky for the idea...)

I know it's a bit late but I had issues with a modal window not allowing some links on the menu bar to work, even when it has not been triggered. But I solved it by doing the following:

.modal{
display:none;
}

If you need to change the bottom position of the modal, you need to modify the max-height of the modal-body:

.modal-body {
  max-height: 75vh;
}

As other answers have said, you can adjust the right and top on the modal-dialog :

.modal-dialog {
  top: 10vh;
  right: 5vw;
}

• "vh" means "% of view height"
• "vw" means "% of view width"