alfresco-ng2-components/lib/core/buttons-menu/buttons-menu.component.scss

@mixin adf-buttons-menu-theme($theme) {

    .adf-buttons-menu {
        margin-right: 10px;

        & div {
            display: flex;
        }

        &-mobile {
            margin-right: 10px;
        }

        &-desktop  {
            display: flex;

            button {
                color: black;
                padding: 0;
            }

            button > span {
                display: none;
            }

            button > mat-icon.mat-icon.material-icons {
                color: black;
                margin: 0 10px;
            }
        }
    }
}