To search through all open files in all open projects, click the Projects button on the search toolbar to turn on the "all projects" search option. If a search command cannot find a match in the current file, it will automatically continue with the next file. When all files in the current project have been searched through, EditPad Pro will continue with the first file in the next project. EditPad Pro will continue searching until either a match is found, or all files in all projects have been searched through.
The Fold Lines search command always works on the current file only, regardless of the "all projects" option. The Highlight All option is a global toggle that will always highlight the current file, even when you switch files, until you turn it off, regardless of the "all projects" option. All the other search commands respect the "all projects" option as explained above.
Search|Prepare to Search
Search Option: All Files
Search Option: Closed Files