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resetcounterperpage=footnote

\usepackage[resetcounterperpage=footnote]{xepersian}

\backgroundsetup{contents={}}

\usepackage[%
angle=45,
opacity=.5,
scale=1,
]{background}

\backgroundsetup{%
contents=\includegraphics{example-image}%
}

texdoc background

\setmathdigitfont [Options] {⟨font naⅿe⟩} [Options]

\usepackage[%
mathdigits=persian%
]{xepersian}

\usepackage[%
inlinemathdigits=persian,%
displaymathdigits=default%
]{xepersian}

\SwitchToDefaultMathDigits
\SwitchToPersianMathDigits

\[{\SwitchToDefaultMathDigits
 0123+3.14+\mathbf{0123xyz}+8}
 =0123+3.14+\mathbf{0123xyz}+8.\]

\settextdigitfont [Options] {⟨font naⅿe⟩} [Options]

\setdigitfont [Options] {⟨font naⅿe⟩} [Options]

\settextdigitfont{}
\setmathdigitfont{}