I am trying to do a list with itemize in beamer and the bullets are not shown. I've read some comments here that the enumitem package might be the problem but I don't use it so I don't why this is happening. I would be glad if someone can have a look at my preamble and stress what's the problem. Here is my preamble code:
\documentclass[xcolor=dvipsnames,hyperref={breaklinks=true},mathserif,professionalfont,12pt]{beamer} \usepackage{ragged2e}\usecolortheme[named=RoyalBlue]{structure} \useoutertheme{infolines} \usetheme[height=7mm]{Rochester} \setbeamertemplate{items}[ball] \setbeamertemplate{blocks}[rounded][shadow=true] \setbeamertemplate{navigation symbols}{}%\usefonttheme{serif}\usefonttheme{professionalfonts}\makeatletter\setbeamertemplate{footline}{ \leavevmode% \hbox{% \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}% \usebeamerfont{author in head/foot}\insertsection \end{beamercolorbox}% \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}% \usebeamerfont{title in head/foot}\insertsubsection \end{beamercolorbox}% \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,right]{date in head/foot}% \usebeamerfont{date in head/foot}\insertshortdate{}\hspace*{2em} \insertframenumber{} / \inserttotalframenumber\hspace*{2ex} \end{beamercolorbox}}% \vskip0pt%}\makeatother\usepackage[utf8]{inputenc}\usepackage{tikz}\usetikzlibrary{shapes.geometric, arrows,positioning}\tikzset{ startstop/.style={ rectangle, rounded corners, minimum width=3cm, minimum height=1cm, align=center, draw=black, fill=red!30 },process/.style={ rectangle, minimum width=3cm, minimum height=1cm, align=center, draw=black, fill=blue!30 }, decision/.style={ rectangle, minimum width=3cm, minimum height=1cm, align=center, draw=black, fill=green!30 }, arrow/.style={draw,thick,->,>=stealth}, dec/.style={ ellipse, align=center, draw=black, fill=green!30 },}%\usepackage[margin=1in]{geometry}%margins%\usepackage{amsmath}%math..\usepackage{graphicx}%graphics\usepackage{refstyle}%refstyle\usepackage{float}%graphs floating\usepackage{subcaption}%subcaption\usepackage{makecell}%tables\usepackage{diagbox}%diagonal tables\usepackage[nottoc,numbib]{tocbibind}%ref\usepackage[redeflists]{IEEEtrantools}\usepackage{gensymb}\usepackage{listings}\usepackage{mathtools}\usepackage{bbm}\usepackage{ucs}Thanks,Roi