Locate your current theme in ~/.zshrc file defined under variable named ZSH_THEME. You are supposed to edit the file according to the theme(current zsh theme) defined here. Default one is robbyrussell.
For default theme edit this file: ~/.oh-my-zsh/themes/robbyrussell.zsh-theme Find PROMPT variable definition in file(Note: You can find multiple variable declaration with concatenation, find the one that matches structure mentioned below). It should have something like below:
PROMPT+='%{$fg[blue]%}%~%{$reset_color%}
Modify the middle part of PROMPT variable as your preference from following to change prompt path. Example how path would look like for each setting is shown below:
%~% -> shows: ~/example_dir/temp/hello_world
%d% -> shows: /User/ydave/Desktop/example_dir/temp/hello_world
%2d -> shows: temp/hello_world
%3d -> shows: example_dir/temp/hello_world
%c% -> shows: hello_world