I want to create a large modal for presenting specific information. So i setup my parameters below. experimentTest() { this.dialog.open(LargeDialogComponent, { data: { dataSet: this.dataSet}, minWidth: '90vw', minHeight: '90vh', }); } However while that does take up right size, for some reason mat content is only about 4/5ths of the modal, and there is a huge amount of space between the mat actions and the bottom of the modal as per the image. My html component is simple <h2 mat-dialog-title>Large Dialog</h2> <mat-dialog-content> //content </mat-dialog-content> <mat-dialog-actions align="end"> <button mat-button mat-dialog-close type="button">Close</button> </mat-dialog-actions> There is no additional styles being applied. Continue reading...