Hi, Can anybody be kind to give me some hint in this problem? I tried to adjust the order of items in the two columns in a way that the picture in the right column shows up from the first slide and items in the left column appear one by one. The lyx-converted LaTeX code is llisted below. However, in the generated file the picture shows up after all items in the left column are displayed. It seems to me that \onslide has no effect at all in this case. Does any body have any suggestion? Thanks in advance. %% LyX 1.4.1 created this file. For more info, see http://www.lyx.org/. %% Do not edit unless you really know what you are doing. \documentclass[size=12pt,letterpaper,landscape,english,mode=present, style=sailor, display=slides, paper=screen]{powerdot} \usepackage[T1]{fontenc} \usepackage[latin1]{inputenc} \usepackage{amsmath} \usepackage{graphicx} \usepackage{amssymb} \makeatletter %%%%%%%%%%%%%%%%%%%%%%%%%%%%%% User specified LaTeX commands. \usepackage{amsmath} \usepackage{pst-node} \usepackage{listings} \usepackage[percent]{overpic} \usepackage{pstricks} \usepackage{infix-RPN} \usepackage{pst-plot} \usepackage{pst-node} \usepackage{pst-tree} \usepackage{algorithm} \usepackage{algpseudocode} \usepackage{multirow} \usepackage{verbatim} \usepackage{xkeyval} \usepackage{hyperref} \pdsetup{% randomdots, dprop={dotstyle=ocircle,linewidth=.25pt}, dmindots=5,dmaxdots=5, dminsize=600pt,dmaxsize=700pt, dbright=50, lf= left footer, rf= right footer } \hypersetup{backref,colorlinks=true} \usepackage{babel} \makeatother \begin{document} \lyxend \lyxwideslide[trans=Blinds]{Operating Systems (1)} \twocolumn[lcolwidth=.5\linewidth,rcolwidth=.5\linewidth] { \begin{itemize} \item CPU is controlled by \textbf{software} - instructions that tell it what to do \pause \item System software: takes care of behind-the scenes details \pause \begin{itemize} \item Includes the operating system (OS): the operating system determines what your screen display looks like as you work and how you tell the computer what you want it to do \pause \end{itemize} \item Most PCs today use some version of the Microsoft Windows operating system \pause \end{itemize} }{ \onslide{1-} { \begin{center} \includegraphics[clip,scale=0.12]{WinXP} \end{center} } } \lyxend{} \end{document} __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com