Add another logo in right lower corner in the Overleaf's Berkeley theme

Question

I am trying to modify Beamer's Berkeley theme. I'd like to have the oblique blue line at the bottom of each slide to break in the middle of the slide and insert in a mirror another logo over a white background. Unfortunately, I am not that skilled with such complex LaTeX code.

Answer 1

In the file beamerthemeUCBerkeley.sty, search for \setbeamertemplate{background} and replace that with this code.

\setbeamertemplate{background}{%
\begin{tikzpicture}[overlay,remember picture]
\fill[BerkeleyBlue] (current page.south west) -- +(0, 0.18\paperheight) -- +(0.5*\paperwidth, 0.08\paperheight) -- (current page.south) -- cycle;
\node[anchor=south west,inner sep=0pt,draw=none,xshift=0.055\paperheight,yshift=0.04\paperheight] at (current page.south west) {\pgfuseimage{logo}};%

% 2nd logo
\node[anchor=south east, inner sep=5pt, xshift=-0.055\paperheight, yshift=0.04\paperheight, fill=BerkeleyBlue] at (current page.south east) {\pgfuseimage{logo}};
\end{tikzpicture}%
}

Output:

You can adjust xshift and yshift in the 2nd logo to place it as you like. The inner sep setting controls the padding between the logo and its fill border.