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Change active project or default project
Here we will share some of the basic Qt Creator setting information while creating projects.
Change Active Project
To change active or default project, see the attached image
Click on OptionsMenu which is my project name and you will see a list of projects. Select any project from that list to make it active project.
Note: List will contain only opened projects so make sure you have opened multiple projects before doing this.
To add new platform for build. Go to Projects (Icon) in the Qt creator ->Select the Project Tab -> Targets -> Click the + sign on right hand side. Similarly if you want to remove any plateform you can click on - sign on left hand side.
Adding New Build Settings