There is a popular function that can display the target object to full screen in using computer. This function has a feature that many contents on last active object are hidden by the other object when the user switches the active object to the other object. Therefore, the resource for thinking is consumed by keeping the memory of the hidden information. In this paper, we propose three ideas for keeping the display of contents on active object below. One is an idea that is keeping the desired object to front side of the screen. The other idea is to list files while displaying the active object. And to set automatically the size and position of object to the frequently used size and position file by file. In addition this paper describes how to apply the above ideas to the control-icon that can easily handle multiple objects and was proposed by the authors' previously.