Changing the preloader from full screen to The shortcode place

If you do not want the loading page to appear in fullscreen, but instead you want these changes to appears on MEC current shortcode, all you need to do is to put the following CSS code in the MEC Settings > Custom CSS:

.mec-wrap {
    overflow: hidden;
    position: relative;
}
.mec-modal-preloader,
.mec-month-navigator-loading {
    position: absolute;
}