How can I print the presentation made in Beamer without white bars? - printing

Question

How can I print on Epson L4160, or any other printer the presentation made in Latex connected with Beamer, having scale of frame 16:9? My trouble is strange, because I don't want to have a white bars... But, what I have discovered, on the preview in Adobe Reader, in full screen preview it looks very good...
Snapshot of printing:
Snapshot of fullscreen presentation:
And code: (due to many lines, I can paste it on other page if it is necessary)
\documentclass[polish,aspectratio=169]{beamer}
\usepackage[utf8]{inputenc}
\usepackage{polski}
\usepackage{ragged2e} %justify
\usepackage[inline]{enumitem}
\usepackage{multicol}
\usepackage{gensymb} %degree
\usepackage{colortbl} %color of row
\usepackage{cancel} %fraction cancel line
\usepackage{graphicx}
\usepackage{tikz}
\usepackage{url} %bibliography
\usepackage{amsmath}
\usepackage{subcaption}
\usepackage{scalerel}
\DeclareMathOperator*{\Bigcdot}{\scalerel*{\cdot}{\bigodot}}
\usetikzlibrary{positioning, calc}
\usetheme{Warsaw}
\definecolor{myAmber}{rgb}{1.0, 0.49, 0.0} %#FF7E00
\usecolortheme[named=myAmber]{structure}
\setlength{\parindent}{0pt}
\title{Wprowadzenie do matematyki}
\subtitle{2. Koniunkcja i alternatywa w zdaniach.}
\author{Konstanty Dmochowski}
%\date{}
\expandafter\def\expandafter\insertshorttitle\expandafter{%
\insertshorttitle\hfill \hspace*{3.85cm}%
\insertframenumber\,/\,\inserttotalframenumber}
\makeatletter
\long\def\beamer##ssection*#1{\beamer#section[]{}}
\makeatother %remove section both from header and outline in beamer
\newcommand{\lcancel}[2]{\cancel{#1}_{#2}}
\newcommand{\ucancel}[2]{\cancel{#1}^{#2}}
\newcommand*{\rechterWinkel}[3]{% #1 = point, #2 = start angle, #3 = radius
\draw[shift={(#2:#3)}] (#1) arc[start angle=#2, delta angle=90, radius = #3];
\fill[shift={(#2+45:#3/2)}] (#1) circle[radius=2.5\pgflinewidth];
}
%\special{pdf:encrypt ownerpw (prezentacjaPL2020) userpw (prezentacja2020) length 128 perm 2052}
\AtBeginSection[]
{
\begin{frame}
\frametitle{Plan pracy}
\tableofcontents[currentsection]
\end{frame}
}
\begin{document}
\begin{frame}
\titlepage
\end{frame}
\begin{frame}
\frametitle{Plan pracy}
\tableofcontents
\end{frame}
\section{Wprowadzenie}
\begin{frame}{O czym będziemy mówili?}
\begin{figure}[h!]
\begin{center}
\includegraphics[scale=0.2]{idea-3383766_1280.jpg}
\end{center}
\caption{Jak sądzicie?}
\end{figure}
\end{frame}
\begin{frame}{Przypomnienie}
\justify
Do tej pory mówiliśmy wyłącznie o \textbf{zdaniach logicznych} i ich \textbf{zaprzeczeniach}.
\\[0.25cm]
\pause
\textbf{Przykład:} \textit{Kwadrat ma nieskończenie wiele osi symetrii.}
\pause
\\[0.25cm] Są to tak zwane zdania proste - wyrażają one bowiem jedną myśl, składają się z jednego orzeczenia.
\pause \\[0.25cm] \textcolor{myAmber}{Pytanie:} Co się dzieje, gdy zdanie jest bardziej rozbudowane, skomplikowane? W jaki sposób wówczas z nim poradzić?
\end{frame}
\subsection{Zdania złożone}
\begin{frame}{Zdania złożone}
\justifying
Okazuje się, że zdania tej postaci:
\\[0.25cm] \pause \textit{Wojtek poszedł do kina lub zjawił się na stadionie.}
\\[0.25cm] \pause \textit{Eliza narysowała dom i wymieniła cieńkopis.}
\pause \\[0.25cm] prowadzą nas do nowego pojęcia: \textbf{zdania złożonego}. Powiedzmy coś o nich.
\end{frame}

Answer 1

To get more or less the same aspect ration than a A4 paper, you could modify the page geometry like this:
\documentclass[polish,aspectratio=169]{beamer}
\usepackage[utf8]{inputenc}
\usepackage{polski}
\usepackage{ragged2e} %justify
%\usepackage[inline]{enumitem}
%\usepackage{multicol}
\usepackage{gensymb} %degree
%\usepackage{colortbl} %color of row
\usepackage{cancel} %fraction cancel line
%\usepackage{graphicx}
\usepackage{tikz}
%\usepackage{url} %bibliography
%\usepackage{amsmath}
\usepackage{subcaption}
\usepackage{scalerel}
\usetheme{Warsaw}
\definecolor{myAmber}{rgb}{1.0, 0.49, 0.0} %#FF7E00
\usecolortheme[named=myAmber]{structure}
\title{Wprowadzenie do matematyki}
\subtitle{2. Koniunkcja i alternatywa w zdaniach.}
\author{Konstanty Dmochowski}
\makeatletter
\setlength\beamer#paperwidth{16.00cm} \setlength\beamer#paperheight{11.31cm}
\geometry{%
papersize={\beamer#paperwidth,\beamer#paperheight},
hmargin=2cm,%
vmargin=0cm,%
head=1cm,% might be changed later
headsep=0pt,%
foot=1cm% might be changed later
}
\makeatother
\begin{document}
\begin{frame}
\titlepage
\end{frame}
\end{document}
Some other comments about your code:
don't use enumitem with beamer
beamer has its own column mechanism, multicol is not necessary
if you need something from the colortbl package, use the xcolor={table} documentclass option instead of loading the package
you don't need graphicx
you also don't need url - beamer loads hyperref
no need for amsmath either, beamer already loads this
using floating specifier such as [h!] in a documentclass without floating mechanism makes no sense
don't use \begin{center}...\end{center} within your figures. This adds additional vertical space and is also unnecessary because figures are centred by default
don't abuse \\ for line breaks. Leave an empty line instead
instead of manually numbering things like Definicja 1., use an appropriate environment like definition, these can be made to number things automatically
Just give the filename of images without file type. Latex will automatically choose the best suited type in case you have the image in different formats
have a look at the booktabs package. Data prison style tables are really ugly
it should be \justifying and not \justify (the later kinda works by accidents, but causes many strange problems because it actually is an environment and not a macro)