Open the "officebuilding" photo below. If you want to use your own choice of photo from the internet, make sure it is a color photo (not a black & white one or just words)...
Convert it to Black & White.
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You can do this under COMMANDS>Creative>... and Convert to Grayscale, or
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go to FILTERS>Hue & Saturation, removing all Saturation (first "colorize", then set Hue and Sat to "0").
Go to FILTERS>Other>Find Edges ... it'll look something like this...
Save as "line art" in your Z:>GA8>Photos>Basics folder.