Drop the image gallery portlet in the page and then go to look and feel of the portlet configuration and then add the below code in the enter your css or in advanced style.
.lfr-asset-column-actions .lfr-asset-column-actions-content {
border: 1px solid #88C5D9;
padding: .7em;
padding: .7em;
}
.rtl .aui-column, .ltr .aui-column-last {
float: right;
display: none;
}
#portlet_31{
padding:o auto;
}
.rtl .aui-column, .ltr .aui-column-last {
float: right;
display: none;
}
#portlet_31{
padding:o auto;
}
.aui-w3-4, .aui-w75 {
width: 100%;
}
width: 100%;
}
.top-links-navigation{
display:none;
}
.header-back-to{
display:none;
}
display:none;
}
.header-back-to{
display:none;
}