Display control method and display control apparatus

A non-transitory computer-readable storage medium storing a display control program that causes a computer that is able to control a screen to execute:

• an area display step that is able to display, on the screen, a tab display area that is able to display one or more tabs associated with one or more content items in a tree view and a content display area that is able to display any of the one or more content items;
• a target display step that is able to display, in response to a display target tab being selected from the one or more tabs, a display target content item associated with the display target tab in the content display area;
• a tab adding step that is able to update, in response to an addition request to add an additional content item, the tab display area so as to display an additional tab associated with the additional content item;
• and
• a tree editing step that is able to edit a tree structure of the tree view,
• wherein the tab adding step is able to update display of the tab display area such that the additional tab appears as a child node of the display target tab in the tree view,
• wherein the area display step is able to display the one or more tabs in the tree view in the tab display area in such a manner that a parent tab that is a tab associated with a content item corresponding to a parent node of the display target content item associated with the display target tab, the display target tab, and a child tab that is a tab associated with a content item corresponding to a child node of the display target content item associated with the display target tab are arranged in a predetermined direction in the tree structure and that the display target tab and a sibling tab that is a tab associated with a content item sharing the parent node with the display target content item associated with the display target tab are arranged in a direction substantially perpendicular to the predetermined direction in the tree structure, and
• wherein the tree editing step is able to move a movement target tab and one or more tabs corresponding to one or more descendant nodes of the movement target tab in the tree structure.