I needed to be able to add the following lines to the managed-schema file.
<fieldType name="text_ngrm" class="solr.TextField" positionIncrementGap=
"100">
<analyzer type="index">
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.NGramFilterFactory" minGramSize="1"
maxGramSize="50"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
<analyzer type="query">
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
</fieldType>
<field name="name" type="text_ngrm" indexed="true" stored="true"/>
can those lines be added using Solr UI?