grid_flex.xml

<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
<T3DataStructure>
	<ROOT type="array">
		<type>array</type>
		<el type="array">
			<headline type="array">
				<TCEforms type="array">
					<label>Überschrift</label>
					<config type="array">
						<type>input</type>
						<size>48</size>
						<eval>trim</eval>
					</config>
				</TCEforms>
			</headline>
			<image type="array">
				<TCEforms type="array">
					<label>Bild</label>
					<config type="array">
						<type>group</type>
						<internal_type>file</internal_type>
						<allowed>jpg,gif,png</allowed>
						<max_size>2000</max_size>
						<uploadfolder>uploads/tx_gridelements</uploadfolder>
						<show_thumbs>1</show_thumbs>
						<size>3</size>
						<minitems>0</minitems>
						<maxitems>1</maxitems>
					</config>
				</TCEforms>
			</image>
			<link type="array">
				<TCEforms type="array">
					<config type="array">
						<type>input</type>
						<eval>trim</eval>
						<wizards type="array">
							<_PADDING>2</_PADDING>
							<link type="array">
								<type>popup</type>
								<title>Link</title>
								<icon>link_popup.gif</icon>
								<script>browse_links.php?mode=wizard&amp;act=page</script>
								<params type="array">
									<blindLinkOptions>file,spec,email,folder</blindLinkOptions>
								</params>
								<JSopenParams>height=300,width=500,status=0,menubar=0,scrollbars=1</JSopenParams>
							</link>
						</wizards>
					</config>
					<label>Link</label>
				</TCEforms>
			</link>
			<text type="array">
				<TCEforms type="array">
					<config type="array">
						<type>text</type>
						<cols>40</cols>
						<rows>10</rows>
						<wrap>off</wrap>
					</config>
					<label>Text</label>
				</TCEforms>
			</text>
		</el>
	</ROOT>
</T3DataStructure>

add in content element configuration:

FILE:typo3conf/ext/ms_skin/static/flexforms/hero.xml