How does qt realize array replacement? First, open the project to be operated with Qt Creator. Press the keyboard shortcut Ctrl+F. As a reminder, before pressing the shortcut key, you must open a file in Qt Creator and only load the project. After pressing the shortcut key, a toolbar will appear at the bottom of the window. Click Advanced ... on the toolbox. In the expanded advanced options, select the current project from the search source. Type the keyword you want to find after "Find". Note that when you type a keyword, items that match the keyword are automatically highlighted. Enter the character to be replaced. Finally, press Replace or Replace All as needed.