Classic Mobile UI limitationsIssue Compared to the Desktop UI, the Mobile UI allows less user customization. In the following section, you can view the different customizations that are supported and not supported by the Mobile UI.ResolutionThe supported features of Mobile UI are: Personal favorites and tagsOrder of Home sectionsClient-side scripts Client scriptsUI PoliciesCatalog Client scriptsCatalog UI Policies UI Actions List button (attached to the record in the list)Form buttonForm more item Directing UI actions to external links (in a new tab only)Unique view of list and formUnique customization of Catalog items and categories For more available customizations of the Mobile UI, on your instance, go to System Properties > Mobile UI Properties. The unsupported features of Mobile UI are: Adding new sections to the homepageUI Actions on the list headerChanging the CSS of the UI (font size, icons size, margins, etc.)Directing modules or favorites to external linksCustomizing the auto-complete attributes on a reference field Other base system elements/features which are not supported on the Mobile UI (taken from product documentation): HTML fieldsLive FeedSwitching to the standard browser interface from the smartphone interfaceInterceptorsThese variable types: Macro With LabelUI PageList CollectorHTMLMacroLabelBreak Data lookup rules