This is what it looks like
The HTML:
<ion-content fullscreen class="ion-padding">
<div id="container">
<app-columns>
</app-columns>
<ion-fab horizontal="end" vertical="center" slot="fixed">
<ion-fab-button color="danger">
<ion-icon name="add"></ion-icon>
</ion-fab-button>
</ion-fab>
</div>
</ion-content>
CSS:
`#container {
left: 0;
right: 0;
top: 30%;
height: 100%;
}