@openui5/sap.m/src/sap/m/themes/base/AdditionalTextButton.less

OpenUI5 UI Library sap.m

.sapMBtn .sapMBtnAdditionalTextContent .sapMBtnText {
    flex-direction: column;
    font-size: 0.875rem;
}

.sapMBtnAdditionalTextContent .sapMBtnContentAddText:not(.sapMBtnActive) {
    width: 100%;
    float: left;
    color: @sapUiContentLabelColor;
    font-size: @sapMFontSmallSize;
}

 .sapMBtn:hover > .sapMBtnAdditionalTextContent.sapMBtnTransparent.sapMBtnHoverable:not(.sapMBtnActive):not(.sapMToggleBtnPressed) .sapMBtnContentAddText {
    color: @sapUiContentLabelColor;
}

.sapMBtnAdditionalTextContent .sapMBtnContent {
    line-height: 1.125rem;
}

:not(.sapMBtnDisabled) > .sapMBtnInner.sapMBtnActive .sapMBtnContentAddText {
	background-image: none;
	background-color: @sapUiButtonActiveBackground;
	border-color:     @sapUiButtonActiveBorderColor;
	color:            @sapUiButtonActiveTextColor;
	text-shadow:      none;
}

.sapMBtnAdditionalTextContent .sapMBtnContent {
    display: flex;
    flex-direction: column;
    justify-content: center;
    line-height: normal;
}

.sapUiSizeCompact .sapMBtnAdditionalTextContent .sapMBtnContent {
    line-height: 0.8125rem;
}