you can see from this link the sample of show, close and hide form. I'm gonna tackle this for future next videos and once i've done i send you the link of the videos. gitlab.com/albiemerporte/qt-show-and-close-form.git
you can also consider this Tab Widget that i created video tutorial, which is more lite than show,hide,close form and easy to separate from class; the function of every components. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-X4-_i1QBK5I.html Note: hiding form is saving temporary to cache memory, if you use a lot of form to hide, it could cause slow for the application so always use close() function instead of hide().